The house detective in a big Washington hotel helps a damsel in distress and ends up in the middle of robbery, extortion, and murder in E. Howard Hunt's muscular noir House Dick.
I am a fan of the Hard Case Crime line, which brings back forgotten pulps with lurid new covers, the perfect place for this story of the lost world of house detectives, hat-check girls, newsies, and lunch counter short-order cooks.
In the stranger than fiction category, this one comes from the pen of E. Howard Hunt, Watergate conspirator and very competent and prolific genre writer (under a number of pseudonyms). I have picked him up wherever I come across him and have always found his writing solid.
I bought this one for my beloved Kindle and read it at a good pace.