Pilot Training Materials
There are a few different options for training materials. The FAA provides training materials online and also have many training publications.
Jeppessen is also another publisher that has great training materials. If you are serious about obtaining your certificate and you are just getting started, Jeppessen has a training kit that provides you with almost everything you will need.
FAA Handbooks & Manuals:
Pilot's Handbook of Aeronautical Knowledge
JeppDirect:
Private Pilot Maneuvers Handbook
Instrument/Commercial Handbook
Marv's Golden Pilot Shop:
*Marv's Golden sells the Jeppessen Training kits also. They are not listed on their online site so contact them for pricing.