Marjorie Weinman Sharmat

Nate the Great solves the mystery of the missing picture.

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 investigates two cases that may be connected, involving a missing valentine and a valentine that came from nowhere.

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 interrupts his backyard vacation to find his friend's lost grocery list--before lunch.

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

Nate the Great investigates the disappearance of a homemade pillowcase belonging to Rosamond's cat Big Hex.

Nate and his dog Sludge are determined to find the recipe for his mother's monster cookies.

Nate the Great and his sleuthing dog, Sludge, must become detectives and investigate the case of the missing pink piece of paper that has on it the perfect name, which Esmeralda came up with, to call Rosamond's pet concert.

Though it means Nate can't get his dog ready for the smartest pet contest, he agrees to search for the missing prize for the contest.