THE PURPOSE OF THIS DOCUMENT IS TO PROVIDE AN OVERVIEW of the Security by Book feature in Oracle Assets. Security by Book, available with Release 11i, enables users to secure data access by book and responsibility. It implements the organizational hierarchy concept that was introduced in Oracle Human Resources. This document will instruct users in the method for creating a flexible hierarchy of asset security. It will absolutely eviscerate the topic of security hierarchies in Oracle Assets: the subtleties, the tricks, the special cases, and of course, the basics.