Henry Hemming

Henry Hemming (born December 1979) is an English non-fiction author. In 2017 it was announced that his book, ''M: Maxwell Knight, MI5's Greatest Spymaster'', based on the life of Maxwell Knight, would be adapted for television by Mammoth Screen with screenwriter Matt Charman attached as lead writer.

In order to write the book about Knight, Hemming reviewed declassified MI5 files, interviewed former MI5 agents as well as some of Knight's family. Provided by Wikipedia