I read "A Year of Magical Thinking" (the inspiration for Fair-Weather Friend). It was really, really good. Didion definitely is, like Vanessa said, "such a beautiful writer." It was a very sad book, but extremely well-written. (Incidentally, you can see my review of the book
here).
I bought Watership Down a looooong time ago, read about a quarter of it, and lost track of it. It's a HUGE book, guys, so get ready XD I saw the movie, though, so at least I get what it's all about.
Hawking's book I really want to read. I think it's so awesome that she alludes to him in TTFS. It's one of my favorite lines of hers!