You cannot get a better pooch if you have kids. Only time anyone ever takes offence to ours is when he starts sniffing their giblets and that's their fault for not washing them!
The Kennel Club website has a puppy list, but they are rare nowadays, so ask any breeder to see a draft of the pedigree to make sure there's not too much inbreeding going on in the bloodline. It probably won't be a problem though, as ITs have very few known faults i.e. no hip problems, eye problems, deafness etc, those sort of things.
This is a good book to start off with. Lucy Jackson is the owner of the site I've linked to in other threads and what she doesn't know about the breed isn't worth bothering with!
Another American based site is
www.irishterriers.com , which also has lots of info.
HTH