In this title, readers will learn how spies used covert communication techniques such as secret codes, invisible ink, and tiny cameras to pass intelligence to their handlers. Real-life spies and missions are explored. Readers can also try making their own invisible ink, dead drops, and secret codes. Aligned to Common Core Standards and correlated to state standards. Abdo & Daughters is an imprint of Abdo Publishing, a division of ABDO. Activities for further learning Glossary of key words Index Table of contents This intriguing series will immerse readers in the covert world of spies! Each book shares true stories of spies throughout history taking on secret missions, investigations, and infiltrations. Readers will also learn about the different tools, tips, and tricks used by spies as well as career opportunities for those aspiring to become a spy. Aligned to Common Core Standards and correlated to state standards. Abdo & Daughters is an imprint of Abdo Publishing, a division of ABDO.
