Ebook: Functional C (International Computer Science Series)

I'm an experienced C programmer, and a fan of Haskell. This thorough but concise textbook gave me a new way of looking at C, and showed me both its problems and strengths. It advertises itself as a textbook for first-year college students, so you're unlikely to learn any new features of C from reading this, but, like me, you may learn an entirely new way of understanding the language.