Ovid's Metamorphoses.

Twice now, after getting past book five or so, I begin to waver and eventually call it quits.

I've read sections of Apollo and Daphne and all of Daedalus and Icarus in the original Latin in university, so my interest is there. Unfortunately, just as I have lost my knowledge of Latin, I have also lost in my attempts to read a translation of the work as a whole. Maybe someday I'll come back to it.