I'm pretty sure I remember reading this too. I didn't like it when I read it. In fact, I don't remember caring much for the whole book. I've only read five of the novels (Philosopher's Stone, Dance of the Giants, Dinosaur Eggs, Genesis Deluge, and Army of the Dead), and I really wasn't impressed with most of them. Philosopher's Stone and Dinosaur Eggs were pretty fun, but that's about it.
Truthfully, I like that Indy is PG-13. It's edgy, but it doesn't go overboard. Having Indy drop an F-bomb feels way too strange and unnecessary to me (even if, technically speaking, one or two F-bombs are allowed in PG-13 films).