Mechanics of Materials, 3rd Edition by Roy R. Craig
John Wiley & Sons, New York
Hardcover ISBN 978-0-470-48181-3
An e-book edition is available:
although it looks like they changed the terms to just rental options.
You can also search for the book on Amazon and see what options are available.
If you do decide you want the rental option during the course, I would recommend that you
pick up an older edition of the book to keep as a reference for your follow-on classes and
as an engineer.