I used to work for a large chain bookstore. Bibles were certainly stolen but to what degree I don’t know other than to say it was not uncommon.
The shrink reports I saw had losses per category (fiction, religion, art, history etc.). and not per book.
I don’t really remember the numbers now but IIRC, fiction had the largest rate of shrink which makes sense simply because it had the largest selection per category.
In general, anything fairly expensive had a much higher chance of being stolen which again makes sense.
So things like art & photography books and textbooks (particularly business and medical books) were all at risk. Also titles preferred by teens (Manga and graphic novels) were stolen regularly.
IMHO, if you were to look at shrink by genre, far and away, the most stolen honors would go to urban fiction. We would get 10 or 20 copies of a title in and they would disappear the same day. Anything other than completely removing them from view would result in their being stolen.
This, btw, was in NYC. Obviously, shink statistics will change by location.
Also, if I had to hazard a guess, books were more often stolen for resale and not by an individual shoplifter. This is particularly evident when multiple copies of a single book disappear.
At the store I worked for (and at several other locations), there were outdoor vendors selling books a couple of blocks away from us. Guess where those books came from?
We actually had customers complain that are prices were more expensive than those of the street vendors. Stupidity knows no bounds.