Book: Show us a book you started reading but never finished

I normally persevere with books, even books I’m not enjoying that much. And the thing with Foucault’s Pendulum is that I actually was enjoying it. It was just such a chore and I put it down about two-thirds of the way through and just never picked it up again. Maybe I’ll try again one day as I believe very much that it will be worthwhile finishing it.

Addendum

I did finish this eventually, and actually quite enjoyed it!