It was only a few weeks ago that the Biedermann twins, Tess and Theo, along with their friend Jaime Cruz, followed the secrets of the Morningstarrs' cipher further than anyone had in its century-and-a-half history -- and destroyed their beloved home in the process. But the Old York Cipher still isn't solved. The demolition of 354 W. 73rd Street only revealed the next clue in the greatest mystery of the modern world, and if Tess, Theo, and Jaime want...

Twelve-year-old William Wenton is a code-breaking, puzzle-solving genius. He lives with his family in a quiet Norwegian town. He and his family used to live in England, but eight years ago his grandfather vanished and the Wentons suddenly packed up, moved to Norway, and changed their last name! Neither of his parents will tell William why or share the reason he has to keep his talent for solving codes and puzzles a secret. But then a special exhibit...

A search-and-find adventure invites readers to spot hidden items as they follow fun-loving dog Migloo throughout his weekend, during which he visits the fair, a farm, a museum, and other locations.

"Maybe you're good at spotting Waldo. But can you spot the difference? Head to the museum, where even the sharpest eyes are seeing double. Waldo is wandering through the museum, where there are some devilishly difficult differences to decipher. Finding Waldo and his buddies is hard enough, but who can spot the minutiae that separate one Egyptian tablet from another? The dastardly details that make two maritime scenes unalike? The itty-bitty discrepancies...