What’s the most offensive book you own?

[Brainaddict]

In that case I'd definitely caution against reading 120 days of sodom - it's far, far, far worse than that sort of deeply odd sexual behaviour. It's the only book that I've physically recoiled from when reading sections of it.

It's both terrible and very boring. The repetitiveness of it wore me down most. I don't understand its reputation among literary types.