The Three Coffins by John Dickson Carr [Paperback]

In the 1930s, the people of London were shaken by two bizarre murders that took place on the same day. The killings were carried out in such a way that not only did the murderer seem invisible, but it was as if they had vanished into thin air after committing the crimes.

One evening, a mysterious man, his face concealed by a strange-looking mask, came to meet Dr. Charles Grimard. Several witnesses saw him enter Dr. Grimard’s room, but no one saw him leave. Moments later, hearing the doctor’s terrified screams, people rushed to open the door—only to find the room completely empty, with Dr. Grimard’s bloodied body lying on the floor.

Meanwhile, on Cagliostro Street, the enigmatic magician Pierre Fle was murdered. A gun was found beside his lifeless body, but strangely, there were no footprints in the snow-covered street. Witnesses reported hearing a gunshot and seeing Fle collapse, yet no one had seen the killer.

Now, Dr. Fell takes on the case to unravel the mystery.