t Adventure - Journey Under The Sea by R. A. Montgomery takes YOU deep into the ocean! Readers of all ages will search for the lost city of Atlantis using their submarine, the Seeker. YOU are searching for the lost city of Atlantis. You search the ocean floor and in underwater caves, meeting friendly fish and turtles along the way. You might even find some buried treasure! Will YOU find the lost city of Atlantis? Adapted from the bestselling Choose Your Own Adventure book where YOU choose what happens next to reach three happy endings. Illustrated by French artist Kalon Sardin.