In Søderdal Mum is nursing a broken heart, and a threat hangs over Hilda and her friends: the town’s children may be sent away. Mum has disappeared into her bedroom and into herself after the scandal of the wedding day when she nearly got married to Timian. Hilda feels lonely and downhearted until she finds a black leatherbound book among Timian’s stuff. It turns out to be a diary that Timian kept when he was twelve years old.

While Hilda’s friends and allies try to work out how to stop Vendela from sending the children to China and from becoming a popular media personality, Hilda finds herself becoming fascinated by the boy in the diary. He seems almost like a perfectly ordinary boy. The diary also turns out to conceal a dark secret. A secret that may have huge consequences for the Søder family and for Hilda herself.

Hilda Bumblevik and the Secret of the Diary is the third and final book in the series about Hilda. The Hilda books are full of humour, mysteries and some genuinely scary scenes, as well as being packed with great dialogue and really wonderful depictions of faithful friendship.