Helena Willis is the author of popular mystery stories, including "El misterio del circo" and "El misterio del hotel." She also wrote "Święta w Valleby," a
Martin Widmark is a Swedish author celebrated for his children's mystery series. His works include "The Diamond Mystery" and "Nelly Rapp i Upiorna Akademia," which transport young readers into worlds of puzzles and adventure. Widmark's stories are popular for their engaging plots and accessible style.
Mónica Corral Frías is the author behind the popular "El misterio" series, including El misterio del circo and El misterio del hotel. Her books invite readers into intriguing whodunits.