G
Gordon Korman
Cahills vs. Vespers
The Cahills, a powerful family, face off against the shadowy Vespers in a high-stakes global mystery. This young adult series combines adventure and intrigue as the Cahills race to stop their enemies.
The series follows a specific numerical order, starting with "The Medusa Plot" and continuing through the subsequent titles. It is a direct continuation of "The 39 Clues" series, and reading that first provides important context.
This series is a direct sequel to "The 39 Clues" series, continuing the story of the Cahill family and introducing new adversaries. Many characters from the original series reappear and their ongoing sagas are central to the plot.
While "Cahills vs. Vespers" itself is a spin-off/sequel to "The 39 Clues," there are further related series like "Superspecial" and "Doublecross" that continue the overarching narrative of the Cahill family.