Bryant & May and the Invisible Code, Paperback/Christopher Fowler

The 10th instalment in the popular detective series sees Bryant and May become embroiled in a fiendish case involving witchcraft, secret codes, hidden relics and of course, bloody murder. 'These crime novels have enjoyed a cult following, thanks to Fowler's writing which has been compared to Agatha Christie and Ben Aaronovitch' Stylist Magazine