A modern day Cinderella meets Absolutely Fabulous! Lulu's dopey dad is in trouble. He is about to marry Varaminta le Bone, ex-super model, author of How to be Thin Like Me and mother of the odious Torquil.

Lulu, unlike her father, knows that Varaminta is far from sugar-sweet.

She is determined to save him, but how? Lulu has no idea...until, on her birthday, she stumbles into an odd little bookshop and Ambrosia May's cookbook falls at her feet.

Packed with magical recipes, including one for Truth Cookies, it seems the only way to get Varaminta and Torquil to reveal their true colours.

But that's only if Lulu can only find the strange ingredients (three sun beans? camel butter?) and persuade the ever-dieting Varaminta that these cookies are not to be missed!