Exquisite Corpse by Poppy Z Brite. Like a 35 page first chapter, and stuff like that is always a major league turn off. I blitzed through it the second I got through that

Faulkner’s section with Benjy Compson in The Sound and the Fury with all of the time jumps to disorient the reader in the same way that the character was

I did it on audiobook, so that probably helped me finish it. Reading it physically might’ve been tougher

Lightning by Dean Koontz - book itself was kind of cheesy (and a little overlong IMO), but it is by far the most interesting take on time travel I’ve ever encountered. There’s nothing overly complex about it at all, but let’s just say Koontz found a bit of a (very basic) loophole through the scientific impossibility of time travel