SJ King is the author of the Secret Explorers and Timekeepers series. King loves museums, libraries, and building machines from scrap. King can usually be found exploring - from investigating tiny bugs, to trekking up enormous mountains.Esther Hernando was born and lives in Barcelona. Her work is expressive, fun, colourful, and textured. In addition to illustration, she likes food, movies, television, video games, and hanging out with the people she loves. She wants to make people smile with her illustrations