Print

Exam Preperation

You will finde all the necessary information on the Web site of the ARRL so please have a look in the "Licensing, Education & Traning" section.

Special the subsection "Getting Licensed" will be interesting for you:
http://www.arrl.org/getting-licensed

Notice the validation of the question pools:

Education

For your exam preparation there two printed books or ebooks (Kindle) available from the ARRL for each license class:

Please use the latest valid issues only. You can order the printed issues form the ARRL online store and the ebooks via the Kindle online store from Amazone.

Training

There are different possibilities of traning for your exams:

online training at the ARRL: http://arrlexamreview.appspot.com/

a nice training  Web site is HamStudy.org: https://hamstudy.org/

Apps for iOS and Android mobile devices are also available like "FCC Ham Radio Test Prep" from Dauntless Software:
https://play.google.com/store/apps/details?id=com.dauntless.fbf.ama (Android)
https://itunes.apple.com/us/app/id412428840 (iOS)

For iOS the apps "Amateur Radio Exam Prep" von Patrick J Maloney LLC. are usefull:
https://itunes.apple.com/us/app/amateur-radio-exam-prep-technician/id297951496?mt=8

Check if the app using the latest question pool.