There are many ways people have studied to pass their license test. You should be able to use any combination of these in order to pass the test. It's categorized by media type to help you choose your best method.

• ARRL General Class License Manual 9th Edition Also found at Amazon and many other places books are sold.
  • General License Class Manual Supplement - Supplemental content for the book.
• Pass Your Amateur Radio General Class Test - The Easy Way
• The Fast Track to Your General Class Ham Radio License: Comprehensive preparation for all FCC General Class Exam along with audio book supplement.