Ian Dunbar’s books "Before you get your puppy" and "After you get your puppy" are available as free PDFs online, and are amazing. *searches for links*

If you’re interested in clicker training the "Click For Joy" by Melissa Alexander gives a good basic grounding in how the clicker works and how to use it to build basic behaviours.

I’d reccomend going into a book shop and picking up the books and leafing through them. Find one that uses positive reinforcement (treats and praise) and not one that preaches "dominance theory" (if you want to know why then I’d suggest you pick up "The Culture Clash" by Jean Donaldson. In fact, I’m just going to reccomend TCC anyway, it’s a brilliant book that explains dog behaviour in a way that everyone, from first time owners to dog trainers, can understand). Praise works better than punishment!

Specifically avoid the Monks of New Skete(paraprashed quote from their book: "If your dog isn’t yelping you’re not hitting him hard enough", need I say more?) and Cesar Milan, the man doesn’t know anything (again, TCC for more info).

Sorry for the uber long reply, I love dog-training books!

All links are below.