Out of the Inner Circle: A Hacker's Guide to Computer Security is a book by Bill Landreth and Howard Rheingold, published in 1985 by Microsoft Press and distributed by Simon & Schuster, Inc. (ISBN 0-671-30942-0). The book was created to provide insight into the ways and methods of the hacking community in days before internet became prevalent. Although largely outdated and more than a little nostalgic, it does show what brought on many of the current trends we see in network security today.