Look at this book from a historical perspective, it is complete shit.
One example, the Roman historian Tacitus clearly wrote about the existence of Christianity and Christ in his account of the burning of Rome.
"Consequently, to get rid of the report, Nero fastened the guilt and
inflicted the most exquisite tortures on a class hated for their
abominations, called Christians by the populace. Christus, from whom the
name had its origin, suffered the extreme penalty during the reign of
Tiberius at the hands of one of our procurators, Pontius Pilatus, and a
most mischievous superstition, thus checked for the moment, again broke
out not only in Judæa, the first source of the evil, but even in Rome,
where all things hideous and shameful from every part of the world find
their centre and become popular. Accordingly, an arrest was first made
of all who pleaded guilty; then, upon their information, an immense
multitude was convicted, not so much of the crime of firing the city, as
of hatred against mankind. Mockery of every sort was added to their
deaths. Covered with the skins of beasts, they were torn by dogs and
perished, or were nailed to crosses, or were doomed to the flames and
burnt, to serve as a nightly illumination, when daylight had expired"
It seems counterintuitive that the Romans would try so hard to eradicate a religion that they helped create. And also why any would join said religion given the punishment for doing so.
Forget the fact that the Romans were able to forge an empire over the entire Mediterranean and beyond, their patricians (aristocrats) needed to invent an entire religion in order to deal with a few unruly Jews. Roman law and military might simply were not enough in this case.
All this "historian" has done is cherry-pick information from already well-studied historical accounts in order to come to convenient conclusions. His conclusions are not only convenient, they are bizarre, and seem invented solely to sell books and advance an agenda. It amuses me how all the staunchly atheist kids will mock Christians for accepting the bible on faith, yet will take this guy's revisionist history on (basically) faith solely because it conforms with what they want to believe, sounds familiar doesn't it?