As the title suggests, this user-oriented book explains, in question-and-answer format, the functionality contained within the SAP R/3 (newly dubbed ERP) solution. The book opens with a rudimentary explanation of high-level SAP architecture, mostly to provide some context on how FI (Finance) and CO (Controlling) fit into the entire stack. From that point, the book runs through definitions of terms that one is likely to encounter when learning the SAP functions from a user, rather than technical, standpoint.
The last half of the book contains lists of SAP transactions, SAP tables, and an alphabetical list of SAP terms with their definitions. Though such material is available from SAP's help web site, this book makes that knowledge available in a more succinct, friendly format.