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.

Eleven-year-old Chester and his classmate Skye, tasked with a complex puzzle-solving mission, discover the key to their spy assignment is to stop a heist, but cracking the code could mean finding out things are not always what they seem.

"Grayson Hawthorne was raised as the heir apparent to his billionaire grandfather, taught from the cradle to put family first. Now the great Tobias Hawthorne is dead and his family disinherited, but some lessons linger. When Grayson's half-sisters find themselves in trouble, he swoops in to do what he does best: take care of the problem--efficiently, effectively, mercilessly. And without getting bogged down in emotional entanglements. Jameson Hawthorne...

When a Connecticut teenager inherits vast wealth and an eccentric estate from the richest man in Texas, she must also live with his surviving family and solve a series of puzzles to discover how she earned her inheritance.

Thanks to a DNA test, Avery Grambs knows that she is not a Hawthorne by blood, but clues pile up hinting at a deeper connection to the family than she had ever imagined. Grayson and Jameson, the enigmatic and magnetic Hawthorne grandsons, continue to pull Avery in different directions. Tobias Hawthorne left his entire fortune to Avery, a virtual stranger, rather than to his own daughters or grandsons ... and there are those who will stop at nothing...

When strange and seemingly unrelated 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. First book in the series featuring art sleuth friends Calder and Petra.