I finished Lost and Philosophy. Not great, not awful, somewhat insightful. The essays seemed to get better the later into the book i got. I believe i've stated before that i think i may enjoy a book like this that comes out after the show finishes up. We have a little over half the show completed now so there are so many puzzles that we just don't have enough information about. We could end up deep in time-bending, space-warping, spiritual mumbo-jumbo (fine by me) or we could see that it's all just a guy in a mask a la Scooby Doo.
I've still got several books I am working on so maybe I'll be able to post soon about a different book.