The book cover for The Underpants of Chaos. Lenny and Agatha run from a horde of angry pants.

The Underpants Of Chaos

Lenny and Agatha experience a set of mysterious events called ‘the shivers’. Everyone in school, spontaneously dancing? Rogue chickens firing eggs at people? Possessed underpants?! What could be behind this madness?? Perhaps a strange book… the book. of chaos.

The Underpants of Chaos. Lenny marches into his new school, holding a tuba, epee and his pen dispensers. Written by Sam Copeland and Jenny Pearson. Illustrated by Robin Boyden and Katie Kear. Published by Puffin.
The Underpants of Chaos. Dr Erno and Mr Pardon. Written by Sam Copeland and Jenny Pearson. Illustrated by Robin Boyden and Katie Kear. Published by Puffin.
The Underpants of Chaos. Lenny visits Agatha's house and meets her many siblings. Written by Sam Copeland and Jenny Pearson. Illustrated by Robin Boyden and Katie Kear. Published by Puffin.
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The Underpants of Chaos. Agatha hugs Lenny. Written by Sam Copeland and Jenny Pearson. Illustrated by Robin Boyden and Katie Kear. Published by Puffin.
The Underpants of Chaos. Agatha hides under Lenny's bed. Written by Sam Copeland and Jenny Pearson. Illustrated by Robin Boyden and Katie Kear. Published by Puffin.