Do Not Open!Book - 2017
When Marty finds a cryptic message that claims he is being observed by aliens, Marty attempts to head off this threat to Earth, find his missing cat, and get his homework turned in on time, with help of his best friends.
Publisher: New York, NY :, Harper, an imprint of HarperCollinsPublishers,, 
Edition: First edition
Characteristics: 250 pages : illustrations ; 22 cm