"With groovy illustrations and diagrams, this book is a laugh a minute. We love Trixie the tweenager to death!" Blush!

Ros Asquith is a political cartoonist, famous to all Guardian readers for her Doris strip cartoon which ran for more than ten years. She has written and illustration the hugely successful Letty Chubb series of teenage fiction, published by Piccadilly Press and Scholastic and younger material for Orchard and Collins Picture Books. She lives in North London with her husband - a jazz critic - and two sons.