Differences between this guide and the Gleim FAA Knowledge Test:

The differences are in the basic format of the book. The ASA guide includes its supplemental information in a separate booklet as you will receive it during your actual test. The Gleim version incorporates the supplemental information along with each question. The effect is that the Gleim version works more like a study guide, while the ASA version is more of an actual practice test experience.

Also, the ASA book posts its answers below each question while the Gleim book prints its answers and explanations to the right of the question thus making it easier to block off the answers while you are working on the test.