I am not sure about being the best, but one book that really felt special and still does is :

- The beginning of infinity by David Deutsch.

This book really ignited my love for epistemology in general, and the nature of scientific progress and understanding.

Another notable book for me :

Finite and infinite games by James Carse.

I find the book fascinating if only because the concept the author is describing is both intuitive and counter - intuitive at the same time.