George McGavin, a renowned entomologist, is an honorary research associate at the Oxford University Museum of Natural History and the Department of Zoology of Oxford University. He has several insect species named in his honor. He lives in England.

Jim Kay worked in the archives of the Tate Gallery and the Royal Botanic Gardens at Kew, two experiences that heavily influence his work. He is the illustrator of A Monster Calls, in which he used everything from beetles to breadboards to create interesting marks and textures. He lives in England.