As more and more of his flowers display the bite marks of a wandering tortoise, Nate sets out to uncover the mystery of the reptile's origins.

Nate the Great goes to San Francisco to solve a mystery with his cousin, Olivia Sharp, who is also a detective.

"It's Halloween night, and all the kids are dressed in scary and funny costumes. Their trick-or-treat bags are getting heavier. Nate the Great's good friend Rosamond isn't eating any of her treats. She's sad--and needs Nate's help. Her cat Little Hex is missing. Little Hex hates Halloween, so maybe he's hiding. Or is he lost? Nate and his trusty dog, Sludge, take the case and hunt in the night for Little Hex. They pass robots, pirates, and witches....

Nate the Great and his dog Sludge look for Annie's housekey which has mysteriously disappeared.

Nate the Great finds mystery at the beach when Oliver's beach bag vanishes.

Even a deep snow the week before Christmas can't keep Nate the Great and his dog Sludge from finding the special card sent to Annie's dog Fang by his mother.

Nate the Great solves the mystery of the missing picture.

Perfect Desiree seeks the help of wealthy problem solver, Olivia Sharp, in becoming princess of the school.

Nate and his dog Sludge help Rosamond discover who has been tearing pages out of her books.

Nate the Great and his dog Sludge try to track down Claude's missing Stegosaurus stamp. Includes related facts, recipes, and activities.