Hello, I'm Martha Grimstone, sometimes known as the Magnificent Lady of the Upside-down Writing Act. When I'm not in the mulberry tree, I live with my family in a broken old house built by my Grimstone ancestors.

My father died when I was a baby, but Mama and Grandpa Grimstone refuse to speak of him. I'm determined to find out what really happened. Luckily, Crumpet promises to unlock the door to all our family secrets. He's my baby brother, and he finds a touch of magic at every turn.

The Grimstones: Mortimer Revealed is a gothic fairytale about a magical doll's house, a valley full of thirsty herbs, and a departed father who had a magnificent hidden talent of his own.

'I LOVE the Grimstones. Martha is the perfect heroine for little (and big) girls who find that a pen and a trusty diary are the best way to make sense of a crazy world.' LISA FORREST (Australian Olympian + author)