Lasse and Maja run a small detective agency together. Meet them 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.
What’s going on at the museum in Valleby? Is it really true that the Egyptian mummy came to life after 3000 years? The horror-stricken night watchman claims that he saw the mummy walking around the museum. The very same night, the most valuable painting in the museum is cut out of its frame. Lasse and Maja become involved in a very unusual case.