[nitrogen]

These days I'd say the ISO standard is the only "book" you need to know everything about C.

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf is the most recent draft before the official, purchase-only C11 was published according to http://www.open-std.org/jtc1/sc22/wg14/www/standards. I don't know if it's identical, but it should be close, and it's free.