The Detective’s Notebook

Learn to solve
every clue.

Practical, evidence-led guides for solo sleuths, logic-grid readers and tablet detectives. Start with the method, sharpen one skill at a time, then test yourself with ten free cases.

Get the free sampler

Put deduction into practice

Ten cases. Three levels. One provable answer each.

Download The Weighing Room Sampler and use the techniques from the Notebook on 561 fillable grid cells.

Open the free case files