The first book is almost identical to the movie, to be honest. It's one of the only movie adaptations I've seen where reading the book adds to the movie and watching the movie adds to the book, without there being any major differences to jar you out of either of them. :)

As for fic recs, try this one when it comes to Effie/Haymitch. It's book-based, but -- like I said -- the book and movie canons really are almost identical.