Puzzle books for adults · by B. Kristal

Logic puzzles that run on rails.

Three paperback puzzle books, one railway. Lay a track from the engine to the station. Solve a murder in a single train car. Find one killer among 6,000 tickets.

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Departures · Kristal Line
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Select a row to go to its platform.

The books

Three platforms, three kinds of puzzle

Every puzzle has exactly one solution, and every book carries full solutions at the back. Paperbacks print on demand and ship from Amazon.

Platform 1Cover of Train Tracks: Logic Puzzles for Adults

Logic puzzles for adults

Train Tracks

Draw one railway line from the engine to the station. Each number on the edge counts the dots the line passes through in that row or column. That's the whole rule.

300 puzzles+20 Special Stops6×6 to 12×12
  • Five difficulty lines, from Beginner 6×6 grids to Expert 12×12.
  • 20 Special Stops that bend the rules: Express Run, Station Stops, Rockfall, Into the Fog and Circle Line.
  • A technique guide with a puzzle solved step by step, and full solutions at the back.
Buy on AmazonPaperback · Amazon.com
A beginner Train Tracks puzzle with the three rules: draw one line from the engine to the station, each number counts the dots the line passes through, black pieces are already laid
Try one now. The answer is in the back of the book.
Platform 2Cover of Murder on the Night Train

Floor-plan logic mysteries

Murder on the Night Train

Victor Vance has bought a ticket on the Night Train 116 times. He has never reached the last stop.

100 cases+16 Special StopsEasy to Expert
  • One car, a few clues, one question: who did it? Place every passenger on the floor plan, one to a row and one to a column, and the killer reveals themselves.
  • Four legs of the journey: Departure, The Border, The Mountains and The Coast, where the cars grow to 7×7.
  • Special Stops with two victims at once, a liar among the passengers, and a hidden weapon to identify.
Buy on AmazonPaperback · 145 pages · Amazon.com
Sample case 35, The Will: a train car floor plan, six passengers and six clues to find who killed Victor
Case 35, The Will. A Medium case from the second leg of the journey.
Platform 3Cover of The Killer Boarded at Midnight: find the killer among 6,000 train tickets

A murder-mystery elimination puzzle

The Killer Boarded at Midnight

At five minutes past midnight on 30 December 1937, the Midnight Star pulled out of Halden. By morning, conductor Agnes Wren was dead in the luggage van, and 211 passengers had walked off into the snow.

6,000 tickets24 clues3 acts1 killer
  • One long case. All that's left is Agnes's notebook and the company ledger: every ticket sold that month.
  • Three acts on one line. Cross out tickets clue by clue until one remains, unmask the passenger behind the false name, then work out how and why.
  • About 6–9 hours of solving, with checkpoints, three levels of hints and a full solution.
Buy on AmazonPaperback · Amazon.com
Conductor Agnes Wren's handwritten notebook and a 1937 Halden to Varo railway ticket
Agnes Wren noticed everything. Her notebook survived, and every page is a clue.
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Free review copies

We're giving a limited number of free PDF copies to puzzle fans. No strings attached. If you enjoy the book, an honest review on Amazon helps a small publisher a lot, but it's optional.

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The Killer Boarded at Midnight
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About Kristal Puzzle Games

Kristal Puzzle Games is a small independent publisher of logic puzzle books, written by B. Kristal.

Each book starts with one clear rule and builds from gentle first puzzles to hard ones. Every puzzle is checked to have exactly one solution, and the answers are in the back, so you can always check your work.

The books are screen-free by design: a pencil, a paperback and an evening.

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Paperback on Amazon.com
Author
B. Kristal
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