An interesting, opinionated, literate view of Science Fiction, scarily enough now 20 years old. It examines the history of SF and then goes into a decade by decade examination of SF since about 1890. The chapter on the future of SF was extremely interesting, notably when you look at what actually happened in the late 80's and early 90's. A bit of a plough through book but interesting and well written with a lot of examples.

It was funny for me to read it in light of the fact that I've read such a chunk of the authors mentioned, particularly when I was younger. Now that I'm older I prefer Fantasy to SF but still this book made me want to revisit some of my teenage favourites.