Welcome to the Web site for the computer science textbooks of William Stallings. He is an 12-time winner of the Texty Award for the Best Computer Science and Engineering Textbook of the year, awarded by the Text and Academic Authors Association (TAA). All of the textbooks come with extensive support for students and instructors, including for instructors: projects manual for a wide variety of projects, PPT slides, solutions manual, and online mailing list; and for students: a student support page with useful links and documents, and supplemental online material including, for some books, supplemental online appendices and chapters.
All my books and other Pearson books available via this Web site at a greater discount than online bookstores. Go to discount book purchase.
The books include:
Network Security Essentials, Sixth Edition – new book due April 2016 - details
Cryptography and Network Security, Seventh Edition – new book due March 2016 - details
Foundations of Modern Networking: SDN, NFV, QoE, IoT, and Cloud 
Wireless Communication Networks and Systems – (with Cory Beard)
Computer Organization and Architecture, Tenth Edition
Computer Security, Third Edition
Operating Systems, Eighth Edition
Data and Computer Communications, Tenth Edition
Cryptography and Network Security, Sixth Edition
Network Security Essentials, Fifth Edition
Business Data Communications, Seventh Edition I created and maintain the Computer Science Student Resource Site. This site provides documents and links on a variety of subjects of general interest to computer science students (and professionals).
A number of my published papers are available for download.
ERRATA Here are the latest errata sheets for my books. If you find any other errors, please contact me at
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