In book seven, it's April Fools' Day which usually means pranks and fun, but for Shiloh and his friends they have the added twist of The Watcher! He's back and he's got a score to settle. After a day they won't forget will Cornerstone ever be the same again? Welcome to Cornerstone Middle School where Shiloh and his friends work together to solve mysteries using their combined smarts and skills with help from some cool and crazy gadgets, all while trying to navigate the ups and downs of friendships and crushes. Onyx Kids School Days is a new series that chronicles the funny middle school adventures of Shiloh and his friends. The awkward growing pains that every kid can relate to are combined with a new mystery each day to unravel. Onyx Kids books are a spinoff of the original Onyx Kids that can be found on Onyx Flix and YouTube.