Marjorie Weinman Sharmat

Nate the Great solves the mystery of the missing picture.

Nate the Great follows the clues to find his lost dog, Sludge, in a department store.

When Rosamond's birthday gift for Nate disappears from her sled, the boy detective decides to unravel the mystery.

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.

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

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

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

Nate and his dog Sludge try to solve a case on Halloween night and find themselves locked in a haunted house.

When he finds a torn piece of paper with only part of a word on it, boy detective Nate sets out to find the missing pieces.

While traveling on the train to San Francisco with his cousin Olivia's owl, Nate the Great and his dog Sludge must use all of their detective skills when the owl suddenly disappears.