Jillian Gregory

Premium Audiobooks

Breaking Secret Codes

Breaking Secret Codes

Coded information may look confusing, but most codes provide hints that can help you break them. Learn how to find and interpret code patterns and repetitions. With your new super-sleuthing skills, you’ll be cracking codes in no time! Author - Jillian...

Making Secret Codes

Making Secret Codes

Throughout history, army generals, spies, and even scientists have guarded information through secret codes. Find out how they did it and learn how to create your own secret codes. You and your friends can share secrets that will leave everyone else...