Bedtime. No more!

Super-smart Mariella loves nothing more than inventing, but bedtime keeps getting in the way of all her brilliant ideas.

There's only one thing for it - Mariella has to build a rocket-powered flying suit to zap her round the world faster than the setting sun!

If anyone can invent such a thing, it's Mariella. But without sleep, will Mariella's brilliant ideas just disappear?

Eoin Colfer started writing in primary school with gripping Viking stories inspired by what he was learning in class. In 2001 he published the first book in the Artemis Fowl series, which went on to sell millions of copies across the globe. He says, "I will keep writing until people stop reading or I run out of ideas. Hopefully neither of these will happen anytime soon." Eoin lives in Ireland with his wife and two children and was the Laureate na nog (Irish Children's Laureate) from 2014-2016.
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Katy Halford's love of drawing started in childhood, when she would create paper worlds and play in them for hours. She went on to study illustration at Loughborough University and is fascinated with people and animals. She loves to give her characters accessories and add pattern and details to clothing.