Calum Challenger is a boy with a mission: to track down supposedly mythological creatures and capture their DNA. But while Calum and his friends want to save these beings, an aggressive pharmaceutical company wants to wipe them out.

In this fast-paced, high-tech story, Calum and a group of misfit mates - a computer hacker, a freerunner, an ex-marine and a girl with a very big chip on her shoulder - criss-cross the globe, desperately trying to stay one step ahead of their enemy.

'What a blast. Weird murders, creepy villains, fiendish puzzles, non-stop action - what more could you want from a book?' Charlie Higson 'Lane's writing is detailed, with scenes of exquisite terror ... This is a world of shadowy conspiracies and sinister groups who have agents everywhere ... nothing is what it seems. A hugely enjoyable treat for budding gumshoes' Daily Telegraph 'The dramatic, violent ending leaves enough narrative strings dangling that readers over the age of 12 who enjoy detective fiction will grab for the sequel next fall' Wall Street Journal '... gripping ... fast-moving adventure that will not disappoint fans' Carousel This book was great fun to read and I think that it would be a good read for any teenager. It has a strong plot which is full of unexpected twists, turns and developments. Teen Titles Andrew Lane made all the difference... It's nice to have an author who occasionally indulges us all in wild flights of fantasy The Guardian Children's Books Conan Doyle knew how to tell a rattling good adventure yarn and without a doubt so does Andrew Lane. He writes fluidly, introducing his characters with style and humour, never labouring a scene or wasting words; admirable qualities for any author, but in some ways, even more necessary for someone writing for a younger audience Crime Review

Andrew Lane is an author, journalist and lifelong Sherlock Holmes fan. This is his first series for young adults. He lives in Hampshire with his wife and son. Andrew's passion for the original novels of Sir Arthur Conan Doyle and his determination to create an authentic teenage Sherlock Holmes made him the perfect choice to work with the Conan Doyle Estate to reinvent the world's most famous detective in this new series.