The Doors Open, published by Hodder and Stoughton in England in 1949 and by Walker and Company in the United States in 1962, is the third novel by the British mystery and thriller writer Michael Gilbert. Gilbert, who was appointed CBE in 1980, was a founder-member of the British Crime Writers' Association. The Mystery Writers of America named him a Grand Master in 1988[1] and in 1990 he was presented Bouchercon's Lifetime Achievement Award.[2] Like his first two books, it features Inspector Hazlerigg, although not in a major role. It is, in fact, a very diffuse book in terms of its characters. Angus McMann, who was the chief protagonist of Gilbert's previous book, They Never Looked Inside, is briefly mentioned on the first page and makes a later appearance as a minor character. Hazlerigg does not appear until page 24 and thereafter only at intervals throughout the book. There are, in actuality, three other protagonists who, along with Hazlerigg, share the role of driving the narrative. One is Noel Anthony Pontarlier Rumbold ("Nap"), a junior solicitor in his father's London firm. Nap had spent four months on dangerous missions with the French maquis in occupied France during the war and is, apparently, still a Lieutenant-Colonel, D.S.O. A few years later he will be a main character in Gilbert's well-received novel Death Has Deep Roots. Patrick (Paddy) Yeatman-Carter, an acquaintance of Nap's, is another lead character, as is his uncle, Alfred Lord Cedarbrook, a man with an astonishing background, much sought after by both the Foreign Office and the War Office during WWII and now, apparently, still affiliated with the Secret Service. As well as being a linguist, explorer, soldier, and diplomat, he also has a law degree. All three of them, to one degree or another, carry out private investigations, sometimes with the backing of Hazlerigg, sometimes not.