SPUD - the Super Perceptive Undercover Detectives - are on holiday, but find themselves in a race to solve a new mystery! When they discover puffins coated in waste oil that has been dumped in the sea, they must find out who is to blame. Can they crack the case before more damage is caused to precious sea life and the Welsh coastline?

Karen Owen has been partially deaf since childhood, and wrote the character Callie in Major and Mynah to reflect who she wanted to be when she was younger - funny, clever and with a special goft to hear something that other people could not. She was brought up in Kent and currently lives in London.