Assassins, espionage, giant squid, and mind-blowing adventure combine as one boy sets out to rescue his mentor. Jules Verne meets Young Bond (with sharks)

Praise for Mortlock: A macabre, darkly humorous adventure peppered with deadly thrills. A dazzling debut Guardian Praise for The Demon Collector: Mortlock was a striking debut ... it created a creepy atmosphere that won much praise. The Demon Collector is equally full of well-written suspense but far funnier, with a strong filmic element that fans of Joseph Delaney's Spook's Apprentice and Anthony McGowan's Hellbent will lap up. Amanda Craig, The Times

Jon Mayhew is a man with a dark imagination, who has always loved writing and storytelling. An English teacher (to children and teenagers) for 20 years, he now works as a specialist teacher for children with autism. He has four children himself and, when neither teaching nor writing, he plays in ceilidh bands and runs marathons. Jon lives between the ancient cities of Chester and Liverpool. Jon's debut novel, Mortlock, was shortlisted for the 2011 Waterstones Children's Book Prize, nominated for the 2011 Branford Boase Award and has been chosen for Booked Up 2011. http://www.jonmayhew.co.uk/