"The Man in Lower Ten" by Mary Roberts Rinehart is a turn-of-the-century mystery novel set aboard a train, where attorney Lawrence Blakeley finds himself caught in a web of crime after a past encounter with "the man in lower ten" makes him distrust circumstantial evidence. Blakeley's journey from Washington to Pittsburgh takes a sharp turn when his friend entrusts him with forged notes, and he awakens to find the occupant of lower ten murdered. As Blakeley navigates the investigation, he grapples with strange events, suspicious characters, and a budding romance, all while trying to unravel the truth behind the crime.

The Man in Lower Ten
By Mary Roberts Rinehart
On a speeding train, an attorney’s journey becomes a deadly game, with forged notes, a mysterious murder, and a shadowy past threatening to derail his life.
Summary
About the AuthorMary Roberts Rinehart was an American writer, often called the American Agatha Christie. Rinehart published her first mystery novel The Circular Staircase in 1908, which introduced the "had I but known" narrative style. Rinehart is also considered the earliest known source of the phrase "the butler did it", in her novel The Door (1930), although the exact phrase does not appear in her work and the plot device had been used prior to that time. She also worked to tell the stories and experiences of front line soldiers during World War I, one of the first women to travel to the Belgian front lines.
Mary Roberts Rinehart was an American writer, often called the American Agatha Christie. Rinehart published her first mystery novel The Circular Staircase in 1908, which introduced the "had I but known" narrative style. Rinehart is also considered the earliest known source of the phrase "the butler did it", in her novel The Door (1930), although the exact phrase does not appear in her work and the plot device had been used prior to that time. She also worked to tell the stories and experiences of front line soldiers during World War I, one of the first women to travel to the Belgian front lines.