When seemingly unrelated and strange events start to happen and a precious Vermeer painting disappears, eleven-year-olds Petra and Calder combine their talents to solve an international art scandal.

When winter sidewalks seem to have been mysteriously shoveled, a child wonders if snowmen are magic and have nighttime jobs while the people sleep. Includes hidden pictures.

"Get ready to I Spy in a haunted house with lots of creepy riddles to solve!" --Publisher's description.

The reader is asked to guess what is being described in different illustrations featuring Sesame Street characters.

Rhyming verses invite readers to "spy" particular items in photographs containing dozens of toys and household and natural objects.

The reader follows Waldo and must try to find him in the illustrations as he embarks on a fantastic journey among the Gobbling Gluttons, the Battling Monks, the Deep-sea Divers, and the Underground Hunters in search of a special scroll.

Rhyming verses ask readers to find hidden objects in the photographs.

"Legendary literary game-maker Garrison Griswold is back in action this time with 'Unlock the rock' . . . Griswold has partnered with the famous--and famously reclusive--mystery writer Errol Roy to plan an epic escape room challenge on Alcatraz Island. Emily and James are eager to participate, but the wave of fame they are riding from their recent book-hunting adventures makes them a target. Threatening notes, missing items, and an accident that might...

The simple text asks the reader a series of questions about the characters on each page, and the child must seek out the visual clues to answer.

Back at the Winterhouse hotel for another holiday season, Elizabeth and Freddy, who love puzzles, dig deeper into the mystery surrounding a hotel guest who left behind odd artifacts, including a magical book that evil Gracella Winters once attempted to use to gain destructive power over the entire Falls lineage.