Rob admits having seen a murder, but no one believes him--except the murderer.

The Hardy brothers solve the mystery of the missing inventor and recover some valuable missing jade.

Ottoline Brown and her best friend Mr. Munroe create a clever plan to solve the disappearance of several lapdogs and a string of daring burglarie

When the Hardy boys reached the caves, they came unexpectedly upon a queer old hermit.

When the Hardy Boys set out to solve the mystery of their missing chums, they discover a gang hide-out in a cave on an island along the way.

When strange and seemingly unrelated events start to happen and a precious Vermeer painting disappears, eleven-year-olds Petra and Calder combine

When Mildred the cat disappears, the whole gang become private eyes and set out to solve the case.

When Linka Perflinger, a jaunty mouse, brings a watch into his shop to be repaired and then disappears, Hermux Tantamoq is caught up in a world o

A hard-bitten former search-and-rescue dog helps solve a complicated missing chicken case.

Following the clues concealed within a centuries-old family legacy, Timmi Tobbson and his friends hope to save a dear friend. But only twenty-fou