Alex Woolf is the award-winning author of over eighty books of fiction and non-fiction, mainly for children and young adults. In 2019, he won the Fiction Express Award for his book Mystery at Moon Base One and in 2021 he won the Association for Science Education award for his non-fiction book Think Like a Scientist. His horror novel, Soul Shadows, was shortlisted for the Falkirk Red Book Award. He lives in North London, England.

Paula Zamudio is an illustrator and graphic designer from Mexico. She studied graphic design at university before taking a master's degree in illustration at UPV in Valencia, Spain. She is inspired by fashion from different eras, nature, fantasy, and antiques.