Unnatural Selection

Four years ago, Nick Guthrie nearly died from a brain tumour until he received an experimental treatment that saved his life, even though the treatment brought bizarre and permanent side effects. Now he drinks fake blood to live, and has had to have his new long canines capped, but it's a small price to pay to keep doing the job he loves. He's a cop, part of a London Met Police Murder Investigation team.

His current case involves trying to find the person ritualistically killing gay 'vees'. ...