ASVAB stands for Armed Services Vocational Aptitude Battery. An ASVAB book includes study guides, practice tests and other materials that help to prepare someone for the ASVAB.
The ASVAB is offered at thousands of schools, as well as Military Entrance Processing Stations throughout the country. It is a multi-aptitude test that has been developed and maintained by the Department of Defense. It judges arithmetic reasoning, word knowledge, paragraph comprehension and mathematics. The scores count toward a person's Armed Forces Qualifying Test, which determines whether or not someone is qualified to join the military. Therefore, the ASVAB is taken by those people who are serious about enlisting in the military.