Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace.

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

The adventures of the Alden family as they ride across country in a caboose that has a strange history--or is it a mystery?

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

Cam Jansen and her friend Eric go to the airport to meet Cam's Aunt Molly who has just arrived from France but, before they can say bonjour, a young French girl has disappeared.

Dink and his friends unearth the mysterious truth behind the envelopes incorrectly delivered to his house.

Nancy and her friends help a woman search for her missing grandson.

Ten brief cases allow the reader to match wits with ten-year-old crime-buster, Encyclopedia Brown, as he investigates such cases as whether a diary of George Washington's mother is authentic, or if a UFO picture supposedly taken by the army is real.

Ten brief cases in which the reader pits his wits against those of Encyclopedia Brown, an ingenious twelve-year-old detective.

After finding an unusual present-- a lost puppy-- on Christmas Eve, best friends Bradley, Brian, Nate, and Lucy scramble to find its owner before morning.