Joan Lingard

One day, Will and Lucy's dad just ... vanishes.They have no idea why he's disappeared until a creepy stranger reveals their dad was keeping a BIG secret. Then there's the second clue: an old diary they find hidden in the walls of their Royal Mile house, with a sinister black dagger on it. Will and Lucy must solve a mystery that's over two hundred years old if they want to find their dad and bring him home. But can they find the answers in time to...

Tom is adopted. But he's always known about it, and always considered himself special. But with the arrival of a new, real baby on the scene, Tom isn't so sure he's all that special anymore, and retreats from his parents to his tree-house.