For Christmas I got a copy of the Haynes Technical Manual for the "Millennium Falcon", and I honestly can't decide if this is awesome or ridiculous. On the one hand, it's a technical manual for an entirely fictional spaceship. On the other hand, it's perhaps the single greatest thing since they released the original Transformers series on DVD. (Because Optimus Prime trumps even Star Wars...)
Anyway, I've since read it. It was fun.
#5: "Millennium Falcon Owner's Workshop Manual", by Ryder Windham, Chris Reiff, and Chris Trevas