The fifty-third book: #1008 A Tale of a Tub - Jonathan Swift
Satirical works always rely a bit on the reader understanding what's going on. The best don't necessarily do so - which is why Gulliver's Travels has some good sections - but it means that works that were relevant and entertaining in their day (this was considered Swift's best) are lacklustre these day. The parable of the three brothers comments on the development of protestant religion and how none met Swift's puritan vision. It doesn't feel as relevant today - a few hundred years making a difference in how these religions are perceived and mixed - and I don't really care about the point it's trying to make in the first place.
The long philosophical digressions didn't help either - they always bore me - and on the whole that left me with a novel that had some interesting passages, but bored me just as often. Sorry to disappoint, your best doesn't seem as good to me.