Rosie hates maths, and she has just turned the dial of a vault that has been sealed for seventy-seven years. Now the history wing of the Halden Puzzle Museum is locked, the storm outside has burst a water main, and the only way out is through rooms of numbers older than writing.
Code Crackers
Ages 10–12Code Crackers is a series of illustrated adventures for readers aged ten to twelve about mathematics, logic and codes. Jamal, a puzzle fan, and Rosie, who hates maths, spend nights at the old Halden Puzzle Museum where Jamal's aunt is the night guard, and keep getting locked into its wings, where every door opens only to real maths. Each book delivers one maths topic through a locked room with real stakes, and shows who first found the pattern.