Conventional Current Version (8th Edition) (Floyd Principles of Electric Circuits Series)
This book provides an exceptionally clear introduction to DC/AC circuits supported by superior exercises, examples, and illustrations–and an emphasis on troubleshooting and applications.
In order to take additional classes in Telecom, like fiber optics, and other types of hardware classes this AC/DC Electricity class is required and this is the Text Book for the Class. Floyd is the author and he seems to do a good job.
It covers the basics of circuits, and when used with a virtual circuitry program, helps you learn everything right the first time.