These books are a pilot's best bet. Included with every FAA question are the answers, explanations, subject codes and references, as well as explanations for incorrect answers. All of the questions in the particular FAA test question database are included here and have been arranged into chapters based on subject matter. Topical study, in which similar material is covered under a common subject heading, promotes better understanding, aids recall, and thus provides a more efficient study guide. For either home study or classroom use. Each guide also includes the testing supplement for the particular certificate for reference to testing figures.