Study Guides for Technician, General, and GROL
I've written study guides for the Technician and General Amateur Radio tests, as well as the GROL commercial exam.
These books are geared toward passing the test. Therefore, the are probably not a good choice if you're looking for something to learn about Ham Radio in general. However, if you are interested in learning the material to pass the test without any additional information, then you will find these books helpful. With these books, you will not "memorize" the material. When you take the test, you will have a good understanding of all of the concepts involved, even if you have no prior background.
On the Amazon pages linked below, you can take a look at sample chapters and read the reviews.
Technician, $12.95 paperback, $3.99 eBook:
General, $14.95 paperback, $5.99 eBook:
GROL, $23.95 paperback, $9.95 eBook: