Explorer Academy: The Double Helix, Hardcover

The mystery deepens and the action intensifies for 12-year-old Cruz Coronado and friends in the exciting third book in the Explorer Academy series.

The adventure continues for Cruz, Emmett, Sailor, and Bryndis as they continue their studies at sea and travel to exotic locations around the world. A mysterious person alerts Cruz to impending danger while he and a few trusted pals explore ancient ruins in Petra, Jordan, and search for another piece of the puzzle his mother left behind. Worst of all, now his father has gone missing, which prompts Aunt Marisol, his number one protector, to leave the ship in search of him. Who is the new professor who takes her place? How does the new technology he introduces help or hurt Cruz's quest? Why is Nebula determined to stop Cruz before he turns 13? The clock is ticking as his first teen birthday draws near ... a milestone that will change his life forever, one way or another.

TRUDI TRUEIT has written more than 100 books for young readers, both fiction and nonfiction. Her love of writing began in fourth grade, when she wrote, directed, and starred in her first play. She went on to be a TV news reporter and weather forecaster, but she knew her calling was in writing. Trueit is a gifted storyteller for middle-grade audiences, and her fiction novels include The Sister Solution, Stealing Popular, and the Secrets of a Lab Rat series. Her expertise in kids nonfiction encompasses books on history, weather, wildlife, and Earth science. She is the author of all the narratives for the Explorer Academy series, beginning with Explorer Academy: The Nebula Secret. Trueit was born and raised in the Pacific Northwest, and lives in Everett, Washington.

SCOTT PLUMBE is an award-winning illustrator, designer, and fine artist whose work appears in books and magazines, games, interpretive centers, private collections, and more. His illustrations have been featured in magazines such as Communication Arts (US), Applied Arts (CA), Creative Review (UK), and 3x3 (US).