GURPS 4th edition Space

I picked up a copy of this book out of curiosity, and was quite surprised by the usefulness of the matrial within. the book is light on Gurps mechanics, being more a source book for creating Scifi campaigns then a game manual. the book continually references great Science fiction novels and is geared towards the creation of more or less hard science fiction campaigns but with a space opera feel (Like Traveller or SF). I think if you can find it it makes for a good read and some of the material screams Star Frontiers.