Almost everything you need book-wise for training in the USA can be downloaded as PDF files for free from the FAA website. These are the books that ALL commercially available materials are based on:
Airman's Information Manual (AIM)
Pilots Handbook of Aeronautical Knowledge
Airplane Flying Handbook:
Aviation Weather Services
Student pilot Guide
Private Pilot Test Guide
Aeronautical Chart Users Guide
Weight and Balance Handbook
Federal Aviation Regulations (FAR's) are here: https://www.faa.gov/regulations_policies...
You'll need to learn the General Operating and Flight Rules (14 CFR Part 91) and the Certification of Pilotssections (14 CFR Part 61). https://www.faa.gov/regulations_policies...
The other things, such as a logbook, sectional chart for your area and a course plotter can be picked up for about $25. The only book you really need to buy is a Private Pilot Written Test guide containing examples and answers for all the possible written test questions givenm on the actual FAA test (Jeppeson, Gleim, Sportys, King etc all make them) for about $18.