It depends on what sort of training you had in mind Karen
There are all sorts of dog training books available, most of them can be found at
http://crosskeysbooks.com/index.html If you fancy having a go at clicker training, then Karen Pryor's books are recommended. For general puppy training, you can't beat Gwen Bailey's "The Perfect Puppy". She has also written "Good Dog Behaviour" on training dogs generally. Other authors to look out for are Ian Dunbar, John Rogerson & David Appleby.
I still think classes are a good idea, specially for young Ollie as being so young he needs to be trained separately from your other 2, plus classes will be good for getting him socialised with all sorts of other dogs in a safe environment.