G.T. Karber Books in Order

One hundred murder-mystery puzzles invite the reader to work alongside Deductive Logico, identifying culprits, weapons, locations, and motives. Clues, witness statements, and logic grids gradually reveal a larger secret connecting the cases.

Deductive Logico returns with one hundred murder-mystery logic puzzles set amid island secrets, scholarly riddles, and haunted territory. Readers examine clues and complete deduction grids to determine who committed each crime, how, where, and why.

Fifty murder-mystery logic puzzles take readers into Deduction College, where suspects, weapons, and locations must be matched through careful reasoning. Interactive illustrations and hidden clues connect individual cases to a wider mystery involving tunnels and secret societies.

Deductive Logico’s holiday is interrupted by another hundred murder-mystery puzzles. As readers identify killers through clues and logic grids, a wider investigation leads toward a secret agency, a hidden technological enclave, and a dangerous supercomputer.

As a diplomat secretly working for an intelligence agency, the reader divides word-filled maps into themed territories using cryptic clues. Eighty puzzles grow more complicated as a larger spy story raises questions about the agency’s mission.

Santa Claus has disappeared, and Deductive Logico investigates a string of seasonal crimes. Twenty-five holiday-themed logic puzzles ask readers to weigh clues, identify suspects, and complete deduction grids while following the larger festive mystery.

Seven jeweled skulls vanish before a museum opening, sending Deductive Logico around the world in search of the artifacts. Sixty-four murder-mystery puzzles combine clues, suspects, weapons, and locations as apparently supernatural events complicate the investigation.

A disgraced knight journeys through unfamiliar realms to save his queen while readers solve interconnected word puzzles. Finding a powerful talisman and uniting divided lands means overcoming the interference of a religious faction called the Order.