The excitement is unbearable at the racecourse outside Valleby. Does the rookie have any chance against the three-star jockeys? But when the experienced horses begin to slow down, the whole thing starts to look distinctly dubious. Lasse and Maja realize that they have trotted straight into their new case.

Martin Widmark and Helena Willis bestselling The Whodunit Detective Agency series has sold over 12 million copys worldwide. Meet Lasse and Maja, who runs a small detective agency together, in a series of puzzling mysteries for primary school readers. The stories are set in and around the small town of Valleby, and have a rich gallery of characters to be captivated by on the exciting road to solving the mystery.

The Racecourse Mystery is the seventeenth installment in the series with Lasse and Maja.