He has written introductions to most of the books published in the series, as well as for several of the books published in the British Library's Classic Thrillers series. He has been commissioned to edit and introduce 16 anthologies of classic crime short stories for the series. In 2016, he was commissioned to write a new solution to Anthony Berkeley's classic whodunit "The Poisoned Chocolates Case" and in 2017, the British Library published his "The Story of Classic Crime in 100 Books", which in a starred review, Publishers' Weekly described as 'pan exemplary reference book sure to lead readers to gems of mystery and detective fiction'. The book was shortlisted for the Agatha, Anthony, and H.R.F. Keating awards and longlisted for the CWA Gold Dagger for Non-Fiction. Mystery Readers International gave the book the Macavity award for best non-fiction book of the year.