The Thirteenth Letter

"The Thirteenth Letter" by Natalie Sumner Lincoln is a thrilling murder mystery set in the early 1900s, where a sick man named Paul Abbott returns to his family's lodge near Washington, D.C., and his nurse, Miriam Ward, finds herself at the center of a sinister plot. On a stormy night, as Miriam cares for the ailing Paul, a girl and a clergyman unexpectedly arrive, revealing hidden connections. Chaos erupts when Paul is found dead, thrusting everyone into a whirlwind of suspicion and uncertainty. To make matters worse, after the death, Miriam ends up chloroformed, which complicates the mystery even further, turning her night into a desperate fight for the truth in a world filled with trickery, love, and a relentless pursuit of justice.

Natalie Sumner Lincoln was an American novelist who wrote mystery and crime novels mostly set in her native Washington, D.C.