[Suzerain of Sheol]

Hmm... yeah, I forgot about the omnibus editions. I read all those, but, given how easy Salvatore's writing is and the bigger font in those, I'm going to stick with The Bonehunters as my longest. I don't recall those Drizzt collections taking me more than a day or two to read, back when I actually enjoyed reading his books. It took me almost two weeks to finish his most recent, just for how god-awful everything about it is, though whether it's any worse than his last three before it, I'm not sure.