the book is garbage. throw it away before it burns out the retinas of your eyes. why dignify that kind of nonsense by reading it?
those people used to open the arteries of bulls and shower themselves in the blood, drink it, etc. the people who entertain this cr*p tacitly defame the Eucharist by claiming that were it not for these kind of pagan blood rituals, Christians would not believe that the Eucharist is the Blood of Christ. they claim that the Eucharist is the result of syncretism. of course, to support that, they imply that Scripture and tradition are just a big mistaken, clever myth.
it is modernist distortion that pleases no one but satan. the title implies that the work does honor to the Church. that was just a lie to get you to take the poison.
if all that sits well with you (and it should not) then finish the book. otherwise, burn it, go get your money back, recycle it… don’t let yourself get sucked into devil-inspired projects, like the so-called ‘scholarship’ of these kind of books.
the previous poster’s remark about co-existence is misleading. while both may have been in the same region at the same time, they didn’t have anything in common. it is possible that some converts may have been involved in blood rituals at sometime. that is no reason to suppose that every truth about Jesus and His establishment of the Church and His sending of the Holy Spirit is bs.
p.s. i haven’t read that book, but i have seen others like it, which i never finished.