Genetically-modified teens try to bring down the organisation that made them, in this second action-packed installment in the 21% Monster series.

The girl put her hands on her hips, cocked her head and answered: 'My name is Aurora María Ash-Valero and I'm here to kick your butt!"

Since Darren Devlin and Marek Masters joined forces, there has only been one thing on their minds - taking down XSP, the secret organisation that transformed them into genetically-modified superhumans. Even with 21% monster Darren's incredible strength, and 19% alien Marek's super intelligence, XSP is more than a match for them.

But what if there was another survivor of XSP's experiments? A tall, tough, athletic teen girl able to withstand sub-zero temperatures and track potential predators? A girl who's 17% sabre-tooth polar bear, and out for revenge.

ISBN: 9781474984423

Author: P.J. Canning

Publisher: USBORNE

Hardcover: 352 pages

Dimensions: 20×13 cm