Unlock ancient puzzles and secrets introduced via supercool codes and ciphers in this companion book to the new Explorer Academy series. In the first activity book based on the Explorer Academy, kids test their knowledge of ancient codes and ciphers in a series of head-scratching puzzles designed to outwit even the most clever cryptographers. When kids successfully navigate the codes, they are rewarded with a first-class tour of the Academy. Kids will have a blast, teaming up with the characters from the series and learning firsthand from the world's most renowned scientists, explorers, conservationists, photographers, and journalists. It's a far-flung adventure, too, traveling to historic and majestic locations around the globe.