Warning: the premise of this book is the making of an adult film (a porno, for the folks back home). It... gets a little graphic in places. Sexually, I mean. I mean, Quarry is a killer for hire, so it gets graphic in other ways, too, but... y'know... don't read this one if you have any hang-ups about sex. Or killings. Or, I guess, chili.
Unlike the previous Quarry books, this one actually does have a murder mystery in it. Actually, several murders, and no one (including Quarry) knows whodunit. So that's new.
Sadly, what isn't new is the continued use of a common slur for gay people. Collins continues to put gay characters in his books, and he at least attempts to make Quarry sympathetic to those characters. But then he continues to have other characters call them fairies, or f*ggots, and make jokes at their expense. And yes, the book was originally written in 1977, when it was still ok to do that, I guess. But this edition of the book came out in 2015, and it's still in there, and Collins's afterword (written in 2010) doesn't address it. So maybe he's... ok with it?