Walter Satterhwait is an excellent writer. His loose series of stories involving famous people in the early part of the 20th century has turned out be quite good. (I've also read his "Escapade," which involves Harry Houdini and Arthur Conan Doyle!)
The puzzle or mystery is satisfying, the characters are fascinating, and the atmosphere of another time and place is fully realized. It makes for good reading.
Masquerade (Walter Satterthwait)
Was a classic who-done-it. Set in the 1920's and affluemt man and his mistress are found dead. Thought to be a double suiced.
Two investigators from the Pinkerton agency are investigating. Not too sure this is a suicide, they are convinced a homicide. I did like the story line, moved a little too slow for me and a few parts were a bit unbelievable. But a good read on a lazy day.