I think the route of the Scorpion King was the completely wrong route for the film makers to go down, especially introducing the spin off film. Looking back on the CGI of Dawyne Johnson now as the Scorpion King is unbelievable, it's so bad. Thankfully, you don't get any of this in the book.
Once again, the writing and description from Max Allan Collins is excellent, and he definitely weaves an excellent story, whether you've watched the film or not. There are some minor changes from book to film - this is obviously taken from one of the drafts of the screenplay, before they realised scalping on film probably wouldn't work. (But half-human, half-scorpion would?) There are some changes to the dialogue, with some being described in the book, and spoken by a character in the film.
I really appreciate that Max Allan Collins' stuck right throughout these novelizations, rather than as I've seen previously, passed from author to author, like you do find in some novelization series. I think he was able to focus much more on the storyline this time, as he has already introduced Rick (who annoyingly gets referred to as Richard more than once) and Evelyn, and we already know the story of Imothep and Anck-su-namun, but we get a different spin on it with this novelization.
I just really wish they'd gone with something different than the Scorpion King. Although it comes across better in the book, than it does on film, if you've already seen the film and hated the character, you'll still feel the same reading this. It'll be interesting to see if my feelings change with the novelization of the spin off.