"The Making Of" book is a must-have. It's one of those books that when you start reading it/flipping through it, you can't help but become totally immersed in it.

I haven't seen the "vault" book in person yet, but it seems like it might be an amped-up version of "The Star Wars Scrapbook-The Essential Collection" (also by Sansweet) that came out a few years back (in other words, maybe a bit gimmicky?)

I've been debating whether or not to get the "vault" book, but "the making of" was a no-brainer for me.