Ten-year-old Leo's future and the fate of the extraordinary Whippet Hotel, where his father is the maintenance man, are at stake when a series of cryptic boxes leads Leo to hidden floors, strange puzzles, and unexpected alliances.

2003, Colorado: Alexandra Solarin is summoned home to her family' ancestral Rocky Mountain hideaway for her mother's birthday. Thirty years ago, her parents, Cat Velis and Alexander Solarin, believed that they had scattered the pieces of the Montglane Service around the world. When Alexandra arrives her mother is missing and a mysterious group of houseguests have arrived, along with her aunt and the most powerful piece of Charlemagne's service.

Four brief "stories" about parents, trains, and cows, or is it really all one story? The author recommends careful inspection of words and pictures to both minimize and enhance confusion. Seeing things -- Problem parents -- A waiting game -- Udder chaos.

Scholar Jules Addison and scavenger Amelia Radcliffe join forces to unravel secrets of a long-extinct civilization, only to discover something that could spell the end of the human race.

Miss Bunsen accepts a mysterious invitation for a maze adventure competition, but after Pearl, Millie, and Halinka put their problem-solving skills to the test, they learn it is really a trap--for them and their school.

Elizabeth, eleven, spends Christmas break at Winterhouse hotel under strange circumstances, where she discovers that she has magic, and her love of puzzles helps her solve a mystery.

Leo and Remi have gotten used to the strangeness of the Whippet Hotel, but when the entire top floor is hoisted into the sky and transported to the field of wacky inventions, they find that they must compete against a number of foes to solve a puzzle or lose their beloved hotel forever.

"An interactive bedtime read-aloud starring the adorable puppies from Disney's 101 Dalmatians invites kids to tilt, turn, shake and follow other prompts to discover where a mischievous Patch is hiding among his 98 similarly spotted siblings"--

In an alternate history of New York, three kids try to solve a modern-world puzzle and complete a treasure hunt laid into the streets and buildings of the city.

"All the world is a puzzle, and Mike Brink--a celebrated and ingenious puzzle constructor--understands its patterns like no one else. Once a promising Midwestern football star, Brink was transformed by a traumatic brain injury that caused a rare medical condition: Acquired Savant Syndrome. The injury left him with a mental superpower--he can solve puzzles, calculate equations, and see patterns in ways ordinary people can't. But his condition has also...