Bulldog Drummond is an insurance investigator.
Initially created in 1920 by Herman Cyril McNeile using the pseudonym of "Sapper", Drummond was a well-to-do former officer in the British army who, after WWI, decided to occupy his time as a private investigator. The character quickly caught on as being a man of action that women also enjoyed. Though hardly considered good looking, he was confident and relaxed enough to make him attractive to the opposite sex but quick to action and ready to fight when called upon.
The first four books about Drummond had him going against the highly skilled and gifted evil genius, Carl Peterson. At the end of the fourth, Peterson is killed. Starting with the next book, his primary adversary was the beautiful Irma who was Peterson's lover and who now is determined to get revenge. A total of ten books were written by McNeile.
When Mr. McNeile died in 1937, the series was continued by Gerard Fairlie who was not only a friend to McNeile but was said by many to be the prototype for Drummond in the first place. Fairlie continued the series with seven more books stretching from 1938 to 1954, skipping the war years completely.
A total of 23 movies about Drummond were made, starting with an eponymously titled film in 1932 and going until a remake, also entitled Bulldog Drummond in 1952.
The list of books about Drummond from this period are:
Bulldog Drummond, 1920, McNeile
The Black Gang, 1922, McNeile
The Third Round, 1924, McNeile
The Final Count, 1926, McNeile
The Female Of The Species, 1928, McNeile
Temple Tower, 1929, McNeile
The Return Of Bulldog Drummond, 1932, McNeile
Knock-Out, 1933, McNeile
Bulldog Drummond At Bay, 1935, McNeile
The Challenge, 1937, McNeile
Bulldog Drummond on Dartmoor, 1938, Fairlie
Bulldog Drummond Attacks, 1939, Fairlie
Captain Bulldog Drummond, 1945, Fairlie
Bulldog Drummond Stands Fast, 1947, Fairlie
Hands Off Bulldog Drummond, 1949, Fairlie
Calling Bulldog Drummond, 1951, Fairlie
The Return of the Black Gang, 1954, Fairlie
Bulldog Drummond is in the collection because of two books written more than a decade after Fairlie wrote the last. In 1966, with the tremendous popularity of spy movies thanks to James Bond, the character was resurrected, revised considerably, and presented with every bit of flair that Bond had. Drummond wasn't the only character from the series brought back - his nemesis Carl Peterson is alive and well and joined by luscious women to aid his plans for untold riches.
The new Drummond is considerably better looking and able to attract the eyes of most women. He is suave, smooth, dashing, and deadly, combinations vital to hold his own against the femme fatales his adversary throws against him.
Of interesting note is that the first movie's screenplay, taken from a concept story by the same author, was written by Jimmy Sangster, creator of two spy series of his own.