Living Sober is really, really useful.
I also read Monkey on My Shoulder in the first month and it really helped me.
You can read The Big Book online for free here
Alcoholics Anonymous : Alcoholics Anonymous
Being a nosy bugger, I read The Personal Stories first, then went back to the first chapters. (Also, if I'm honest, I need the Twelve Steps and Twelve Traditions alongside The Big Book to get the most out of it.)
Alcoholics Anonymous : Twelve Steps and Twelve Traditions