Twenty-Six Clues

Published in 1920, 'Twenty-Six Clues' by Isabel Ostrander is a mystery novel featuring a series of interconnected puzzles that the protagonist must solve. The narrative revolves around a murder investigation, where each clue leads to another, creating a complex web of intrigue. Ostrander's work is notable for its clever plotting and engaging characters, contributing to the genre of early 20th-century detective fiction.