Look up Dr Jack Newman. Amazing read! Also has a website with lots of info. The title is different in the US than Canada so I can't tell you the name of it....
He also answers questions if you email. Such a great doc. He's the go-to person for BFing in Canada.
kellymom.com is better than a lot of books, and free.
I just bought "The Womanly Art of Breastfeeding". I've read it twice from the library, so I figured it was time to own a copy.
So That's What They're For!
It's funny and has tons of informations.