In Troubled, the horrific discovery of the naked body of a sixteen-year-old schoolgirl on the banks of the River Don in Sheffield throws DCI Jeremy Cosgrove and his team into a dark world of grooming gangs. Scientist Fenton Nightingale is on the run and out for revenge, still causing havoc with his Trouble arousal cream invention. DCI Cosgrove and DS Theresa Smart know they must catch him to prevent worldwide harm and chaos. The explicit adult content in this fourth book of my "outrageous" Trouble series of powerful crime thrillers is guaranteed to shock as much as the other three books, maybe even more.