I think James Michener's MEXICO has been sitting on my shelf waiting for a decade. So far, I've read the introduction.
I haven't read THE ODYSSEY yet. Or 20,000 LEAGUES UNDER THE SEA. And MUTINY ON THE BOUNTY has made it to the five year mark on the "to be read" shelf.
I have a few contemporaries I'm afraid to read because of subject matter too: THE DEAD AND GONE (Pfeiffer) and SOLD (McCormick).
I read ATLAS SHRUGGED but I'm not sure it was worth it to me. Ayn Rand has an account of her escape from Russia I liked much better--and it's much shorter.