The textbook for COMP375 Computer Architecture and Organization during the spring 2017 semester is:
The Essentials of Computer Organization
and Architecture, fourth edition,
by Linda Null and Julia Lobur, Jones & Bartlett Learning (2014)
ISBN-13: 9781284045611, ISBN-10: 1284045617
The book is available at the A&T Bookstore new for $201.05. You can purchase the book on campus or online.
A list of online book sellers for the textbook can be found at
The best price found for the book is about $22.08 used and $32.36 new. International Editions are paperback with thinner paper. If you buy the book online after the start of the semester, you should pay extra to get the book shipped quickly.
Textbooks are expensive, but in the bigger picture of your education, they are a useful investment. Not having a textbook may result in your not grasping the concepts as well and therefore not getting as good a grade as you might. If you shop wisely, textbooks need not be a major expense. If you buy a $30 used book now, you might be able to sell it at the end of the semester resulting in a trivial overall expense. (If you can sell the $30 book at a profit, it is better than not buying a book at all.)