Robert M. Price.  The Da Vinci Fraud: Why the Truth Is Stranger Than Fiction.  Amherst: Prometheus, 2005.  See here to buy the book.
In The Da Vinci Fraud, atheist biblical scholar Robert M. Price challenges the claims of Dan Brown’s The Da Vinci Code,
 while offering his own ideas.  Price is often associated with the 
Christ-mythicist school of thought, which denies that Jesus historically
 existed.  This is a marginal view within biblical scholarship.
Here are some items:
1.  As in The Incredible Shrinking Son of Man, Price 
explores the possibility that earlier traditions of Christianity did not
 even believe that Jesus died and rose again.  Price refers to ancient 
stories, many of them dating to or after the first century C.E., that 
portray a person surviving crucifixion, a teacher believed to be dead 
appearing to his disciples and trying to convince them that he is not a 
ghost (cp. Luke 24:39), or a living person being prematurely buried in a
 tomb and kidnapped by robbers, resulting in the tomb being empty.  
Price also refers to biblical passages.  In Hebrews 5:7, Jesus tearfully
 and fervently asks God to save him from death, and the text says that 
God heard Jesus on account of his reverence.  In John 19:33-34, Jesus is
 explicitly said to be dead from crucifixion, and a Roman soldier then 
drives his spear into Jesus.  For Price, this could be an addition to 
the text that is intended to make clear that Jesus was dead, against 
Christians who claimed that Jesus did not actually die on the cross.
I am hesitant to say that the stories that Price cites are thoroughly
 irrelevant to the New Testament stories of Jesus’ resurrection.  What 
the relationship is exactly, I do not know.  Some of the stories that 
Price mentions may have been drawing from the New Testament writings or 
traditions, but I am hesitant to say that all of those stories 
were influenced by Christianity, or had the motifs that they did on 
account of Christian influence.  Could the stories, or at least their 
motifs, have influenced New Testament writers, as Price contends?  Well,
 maybe.  If we are discussing the empty tomb in the New Testament 
Gospels, I believe that the motif of an empty tomb in other ancient 
traditions definitely deserves consideration.  At the same time, the New
 Testament stories seem to me to present Jesus as dying and rising 
again.  “Well, that is in the form that they are in now,” one can 
retort.  “Maybe the earlier form of the text was different and did not 
present Jesus dying and rising again.”  Perhaps, but could the New 
Testament Gospel writers have drawn from the ancient stories or motifs 
that Price cites, while still intending to present Jesus as dying and 
rising again?  Maybe they wanted to argue that what happened to Jesus 
was different from what happened in those other cases, or they found 
elements of the stories helpful as they fashioned their narrative, while
 not embracing them totally.
On Hebrews 5:7, in what manner did God hear Jesus after Jesus begged 
to be delivered from death?  Does that have to mean that God delivered 
Jesus from being crucified?  Could Jesus’ resurrection be God’s answer 
to that prayer?
2.  Price also believes that the stories about Jesus’ resurrection 
were influenced, in some way, by ancient myths about dying-and-rising 
gods.  (Does this contradict his point in #1, or does he believe that 
both ideas can co-exist, in some scenario?)  Price lists and describes 
some of these myths.  I agree with Christian apologists and conservative
 scholars that some of these stories do not exactly, or entirely, 
present a dying-and-rising god: some present reincarnation rather than 
resurrection, or a god who is not alive on earth for that long after 
being resurrected (Osiris is alive long enough to impregnate Isis, but 
then he goes to the netherworld).  But I am hesitant to dismiss that 
there was a belief in dying-and-rising gods in the ancient world, even 
though Price should have provided more documentation for the stories 
that he was relating.
Price addresses arguments from conservative critics regarding this 
issue.  Against those who say that stories about dying-and-rising gods 
came after the time of Christianity, Price states that even Christian 
apologists in ancient times had to address the argument that 
Christianity was similar to pagan myths, and they did so by saying that 
Satan was aping Christian themes before Jesus was on earth (Justin 
Martyr in the second century C.E. used this argument, but see here). 
 Against the conservative argument that staunch monotheists like the 
Jewish-Christians of the first century C.E. would not have borrowed from
 paganism, Price refers to the pagan influence on the Israelites and 
Jews up to the time of the Maccabees (which was in the second century 
B.C.E.).  While Price should have addressed whether Jews or Christians 
could have consciously borrowed from paganism in the first century C.E.,
 I do not believe that one can seal historical Judaism and Christianity 
off from pagan influence, as if they were in a pure container.  
Cross-cultural influence is a fact of life.
Price refers to what he believes are possible parallels between the 
Gospel stories and ancient myths: the resurrection of Attis (a Phrygian 
youth with romantic issues) was celebrated after three days, and Jesus 
rose after three days; the Pyramid Texts present someone lamenting that 
she cannot find a dead body, and Mary Magdalene lamented that she did 
not know where Jesus’ body was in John 20:13; and the gods’ resurrection
 often relates to the spring-time, which was when Jesus rose.  I doubt 
that these similarities mean that these myths necessarily influenced 
Christianity: three (or the third of someone or something) is a common 
motif in ancient and modern times, the contexts of these similarities 
were different (i.e., Osiris’ body parts were scattered throughout the 
world, which did not happen to Jesus), and the similarities could have 
been coincidental rather than indicating influence of one source on 
another.  I do believe that Jesus’ resurrection in the spring-time could
 have been significant, however.
Where Price goes with the dying-and-rising-gods argument is that he 
speculates that Mary Magdalene could have been like Isis, or the other 
goddesses (or women) who played a prominent role in the resurrection of 
the dying-and-rising god (or person).  Price initially believed that 
Mary Magdalene had apostolic status, or was head of a Christian 
community, for John 20 depicts her seeing the risen Lord, plus she 
seemed to be depicted as heading a group of women who supported Jesus’ 
ministry (Luke 8:2-3), which (according to Price) was rare in the 
ancient world.  But Price changed his mind on this in favor of the view 
that Mary Magdalene was mythological and was an Isis-like figure.  When 
did Mary resurrect Jesus?  Price believes that the story of the woman 
who anointed Jesus for burial (Matthew 26:6-13; Mark 14:3-9; Luke 
7:37-39; John 12:1-8) is relevant to this question: that it was 
initially within the context of Jesus’ resurrection, but was later 
projected back into the time of Jesus’ ministry, prior to his death.  
Price also refers to Acts 17:18, in which Paul’s pagan detractors 
believe that Paul, in proclaiming Jesus’ resurrection, is promoting 
strange gods.  How would they have reached this conclusion?  According 
to Price, they thought that Paul was proclaiming Jesus and the goddess 
Anastasis (which is Greek for resurrection).
This is all speculative, and yet it does strike me that Mark 14:9 
makes a big deal about the woman anointing Jesus, saying that, wherever 
the Gospel is preached, what this woman has done will be mentioned in 
memory of her.  I also wonder why Paul’s pagan detractors concluded that
 Paul was proclaiming strange gods.
3.  Price argues that Jesus may have been a mythical figure who came 
to be historicized.  According to Price, this happened with other 
mythological figures, as well: Plutarch thought that Isis and Osiris 
were the first monarchs of Egypt, and Herodotus wondered when Hercules 
historically lived.
In reading about Christ-mythicism, something about this view has 
puzzled me.  Do Christ-mythicists believe that Jesus was initially 
believed to have been killed in the cosmic sphere, but that his 
crucifixion was later historicized as an event that took place on 
earth?  I have heard Christ-mythicists argue to this effect, and they 
appeal to pagan gods as parallels.  The thing is, my understanding is 
that many stories of pagan gods take place on earth, not in some cosmic 
realm.  The story of Osiris and Isis is set on earth, right?
How does Price deal with this?  Price refers to Paul Veyne’s Did the Greeks Believe in Their Myths?
 (a book that I have and would like to someday read, but it is boxed 
up), and also Paul Crouchoud.  Price says that Hercules and Asclepius 
were originally heavenly sun-gods, but they were later believed to have 
lived “fleshly lives on earth” (page 129).  On page 252, Price states 
that, according to Veyne, “most people did believe the gods and 
goddesses had existed, but in a twilight zone of history before recorded
 history began: ‘Once upon a time.'”  For Christ-mythicists, was Jesus 
initially believed to have been killed in a cosmic realm, or in the 
remote past on earth?
4.  Price talks about the New Testament canon.  He argues that 
Marcion first set forth a canon, and that so-called orthodox Christians 
added to it because they did not like Marcion’s ideas.  Marcion believed
 that the god of the Old Testament, a god of justice, was a different 
god from the God of the New Testament, a god of love.  According to 
Price, orthodox Christians added to the New Testament canon books that 
were friendlier to their pro-Old Testament view, such as the Gospel of 
Matthew.  Price also believes that additions at some point were made to 
Paul’s writings to make him appear more orthodox, or pro-Torah.  Many 
scholars have narrated, by contrast, that Marcion edited things down to 
conform to his beliefs, rather than that orthodox Christians added 
things to Marcion’s canon.
This post is getting rather long, so I want to briefly interact with some of what Price says about the New Testament canon:
—-Price says that Pauline writings (minus the so-called “orthodox” 
additions that Price believes were made) were not from Paul, but from a 
Marcionite-Gnostic school.  I am not convinced by this.  Paul may have 
influenced Marcion, but I do not think that Marcion or the Gnostics 
composed Paul’s writings.  Paul’s writings have nothing about a sinister
 or obsessively just sub-god creating the world and giving Israel the 
law.  But the Pauline dichotomy between law and grace could have been 
embraced by the Marcionites or the Gnostics, for their own reasons.  
Price may go into more detail about his views on this issue in his book on Paul, which I have not yet read.
—-Christian apologists, and also many mainstream scholars, maintain 
that the Gospels in our New Testament (at least the synoptic ones) are 
earlier than the extracanonical Gospels.  Price seems to me to agree 
with this, overall, at least in this book.  At the same time, he does 
not agree with those who would equate the New Testament writings with 
what came to be accepted as orthodox Christianity, for he refers to 
passages in John and Paul’s writings that strike him as rather docetist 
(i.e., Romans 8:3), the view that Jesus only appeared human rather than 
being human.  Romans 8:3’s statement that Jesus appeared in the likeness
 of sinful flesh does strike me as rather odd; at the same time, Paul 
also says that Jesus was born of a woman (Galatians 4:4) and that Jesus 
was crucified, which seem to be at odds with docetism (and yet who says 
that a non-docetist could not absorb features of docetism?).  I do agree
 with Price, however, that the New Testament may manifest diverse 
Christologies, some of them at odds with what came to be orthodox.
—-Price refers to interesting and relevant considerations: Clement of
 Alexandria quoted, cited, or alluded to a number of non-canonical 
Christian texts, in addition to the canonical ones; some questioned the 
authorship of the Gospel of John, thinking it sounded too Gnostic; and 
even Christians who were later rejected as non-orthodox claimed to have 
learned their teaching from students of an apostle, including Paul and 
Peter.  That makes me wonder how I should deal with patristic claims 
that certain church fathers (i.e., Polycarp) were taught by apostles.  
Should I reject those claims as made-up?  Should I accept that these 
fathers may have been taught by the apostles, yet went their own way, in
 areas, or took the apostle’s teachings in their own directions?  Should
 I believe that the church fathers are telling the truth about their 
apostolic connection, whereas the “Gnostic” Christians are lying about 
theirs, perhaps aping the church fathers?
—-Price refers to the criteria that church fathers used in deciding 
what was canonical.  He seems to identify with the criterion that a 
Gospel had to be widely used in order to be accepted as canonical, or at
 least he presented it as a reasonable criterion.  Wide and long use of a
 Gospel arguably means an earlier date, since there needed to be time 
for a Gospel to circulate.  Plus, “The fewer quarters of the church in 
which it was known, the greater the likelihood of its being a recent 
forgery. (‘Why didn’t we hear about this ‘Gospel according to Wally’ 
till now?  I smell a rat!’)” (page 162).  Price believes that the 
criterion that a Gospel had to be written by an apostle or student of an
 apostle to be more dubious, however, for could not one simply attribute
 a Gospel to an apostle, whether that apostle wrote it or not?  
Christian apologists and conservative scholars have asked why, if this 
were the case, church fathers would attribute Gospels to Mark or Luke, 
who were not even apostles, rather than attributing them to more famous 
apostles.  Price’s answer is that Matthew’s Gospel was more widely known
 and respected than the Gospels of Mark and Luke were, so the latter two
 Gospels were attributed to people who were not apostles, but rather 
students of apostles.