Authors Cheryl R. Schrock's and Steve Heather's AutoCAD Pocket Reference series is popular for good reason. The AutoCAD Pocket Reference, Sixth Edition is a 350 pages softcover text that has proved itself as indispensable and handy time and again.
In this reference guide, the authors provide easy access to important fundamental commands, concepts, and detailed "how to" information for everyday AutoCAD use. The book is divided into 12 different categories. It acts like an expert's cheat sheet, but even better! AutoCAD Pocket Reference is ideal for practitioners in the field ‐ and it is also an excellent tool for students, teachers and AutoCAD users who are always on the move. This reference provides a quick and easy refresh which can be used on occasion or every single day on the use of AutoCAD commands. This pocket reference does not substitute for either introductory or advanced AutoCAD textbooks. Its job is to provide a supplementary reference with which to keep nearby at all times.
To learn AutoCAD quickly and easily, you'll want to obtain IP's Beginning AutoCAD 2014 Exercise Workbook. More experienced users should select the Advanced AutoCAD 2014 Exercise Workbook. These are both by the same authors. Also available are Shrock's exercise workbooks for prior versions of AutoCAD.