The Well of Lost Plots

Each book in the Thursday Next series is as good as the rest. (I won't say better, just because I like them all so much, I couldn't pick a favorite.) What I find so amazing is that Jasper Fforde has created an entire world (two worlds really) and somehow everything makes sense. The explanation of the ImaginoTransferenceDevice seems entirely logical. And as a book and word nerd, I love all the little references that explain why Americans spell honor while the British spell honour, or how Uriah Hope became Uriah Heep. I can't get enough of these books.