Detective Cases

On a bright Saturday in the summer of 1985, the families of a quiet cul-de-sac in suburban Ohio held their yearly yard sale. Folding tables, lawn chairs and handwritten price tags lined every driveway. The Kessler family sold a video game console to someone in the crowd, and only later learned that it had been reported stolen from a house on the next street. Their twelve-year-old son had worked the table, and the neighbors had noticed the shoppers. A patrolman now wants the buyer, and he has three witnesses and one problem: one of them is not telling the truth.

The Lakeshore Hotel stands a few blocks from the Chicago River, an old brick building with five guest floors, one room per floor. On a windy night in March, the night manager found the office safe open and a velvet pouch of antique brooches gone. The office camera had been unplugged for cleaning, so the only record of movement is the elevator’s own log. That log has a hole in it, and the inspector believes the hole is the whole story.

Every March, when the days warm up and the nights stay below freezing, the sugarbush on a Vermont hillside comes alive. Sap drips from the maples into metal buckets, and workers walk the lines each morning to empty them into a gathering tank. At the Hollis Ridge farm, the foreman found that someone had been sneaking sap into a private barrel for a roadside stand. He cannot prove it, so he asks the four workers to state their share. This case is solved with arithmetic alone.

On the sixth floor of an old waterfront building in Seattle, a small design studio keeps a prototype laptop in Room 612, locked behind a door that opens only to a badge. One rainy evening it disappeared. The office manager pulled the badge log for the four people in the building and found something odd right away: one entry is not physically possible. This case rewards patience with a clock.

Cutler’s Ledge Light stands on a rocky island off the coast of Maine, reached only by the supply boat and only at the right moment of the tide. Three keepers share the work of tending the lamp. Every night the keeper on watch writes down when the lamp was lit and when high water reached the landing. One October night a fishing boat struck the ledge in the dark, and the inspector found the lamp cold. The logbook says otherwise, and one of its entries was written by someone who was not honest. You will not need real tide tables: every number you need is printed below.

Merrill College is small, and so is its library, but it holds one treasure: the Whitcomb Folio, a bound set of old county maps kept in the Special Collections room. On a Tuesday afternoon it was gone. A scrap of paper turned up in the book return bin the next morning, covered in capital letters that meant nothing at first glance. Four people had access to the building that afternoon. The note and the records of who was where are all you have. This case combines a short cipher with an alibi check, and every fact needed is printed in the puzzle below.

The Blue Hour is a basement jazz club in lower Manhattan, with a low ceiling, a crowded bar and a stage barely big enough for a piano. On a Friday night in March, a guest trumpeter named Mr. Carver left his horn in its case in the green room and went out to listen from the audience. By closing time the case was empty. The house band of five rotated off the stage all night, and the bartender heard one thing that matters.

The Calloway Ranch sits in rolling Texas Hill Country, far from the nearest town. The family’s pride is a silver and turquoise championship buckle kept in a safe in the tack room. One October night a storm rolled in, and by morning the safe stood open and the buckle was gone. Four people were on the ranch. The ground, the rain and the clock all left evidence behind. This is a pure logic case: every fact you need is printed below, and exactly one arrangement fits.

Every September the county fair builds a white canvas tent for the pie contest, and every year one entry is the clear favorite. This year it is Opal Whitaker’s cherry pie, and by afternoon someone has turned it from sweet to inedible. Five people walked through the cooling tent that afternoon, one at a time, each coming straight from another corner of the fairgrounds. The steward remembers who came from where, who walked in right behind whom, and one important taste. Every clue matters, and there is exactly one saboteur.

A tall brownstone on Marlborough Street, in Boston’s Back Bay, is home to Mrs. Lathrop, a widow, and four people who look after her. On a February night, her pearl necklace was taken from the jewel case on her dressing table. In the morning the inspector interviewed all four, one at a time. He told each only two things: the pearls were gone, and the empty case was found open. There is no confession and no fingerprint here, only one sentence that the speaker could not honestly have said.