Patrick Carman

Where are Amy and Dan Cahill? The two kids were last seen in Egypt, hunting for one of the 39 Clues that could make them the most powerful people on earth. But no one has seen the siblings since. Has the ruthless Irina Spasky finally tracked them down? Or worse ... the Madrigals?

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.

When she finds the key to a secret passageway leading out of the walled city of Bridewell, twelve-year-old Alexa realizes her lifelong wish to explore the mysterious forests and mountains that lie beyond the wall.

Captain Roland Warvold tells Alexa and Yipes about the adventures he shared with his brother Thomas in Elyon, before the wall went up and divided the world in two.

When thirteen-year-old Alexa embarks on a mysterious quest, she finds her old friends Yipes the little man, Murphy the squirrel, Odessa the wolf, and Squire the hawk have been designated to help her.

Stanley Darrow isn't sure what to expect when the mysterious Mr. Gedrick appears on his doorstep. He is certain, however, that his family could use Mr. Gedrick's help: Their lives and their house have been a mess since Stanley's dad died. The strange new nanny quickly helps them transform their cluttered home into a sparkling and spotless version of its former self, but it's going to take more than a clean house to help the Darrow family learn to...

Harold Fuzzwonker, his best pal, Floyd, and the Fizzies must figure out how to convey gallons of Fizz to the Snood Candy Factory, where the creatures are occupied with a world class sugar surge, without uncovering Fizzpolis.

When the evil Snoods steal all the Fuzzwonker Fizz to create the world's crummiest candy, Harold Fuzzwonker and his best buddy, Floyd, orchestrate a daring plan to save Fizzopolis once again.

Twelve-year-old Alexa and her companions unwittingly lead Abaddon, now in the form of an enormous, horrible sea monster, to the secret community known as the Five Stone Pillars when they go to bring the people living there home.

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.