Greg Jenner is a public historian best known as the host of the hit BBC podcasts You're Dead To Me and Homeschool History, his work on BBC's multi-award winning TV series Horrible Histories, and for his books Dead Famous: An Unexpected History of Celebrity, From Bronze Age To Silver Screen and A Million Years In A Day: A Curious History of Everyday Life From The Stone Age To The Phone Age. He is an Honorary Research Associate at Royal Holloway, University of London.

Jenny Taylor is an illustrator and graphic designer originally from Scotland, but now living in Preston, England. Drawing stories since 1997, when she first discovered what pencils and paints could really do, she has finally achieved her childhood dream with this debut book about aliens and jam. When not drawing, Jenny enjoys long walks in the shade with her ginger companion, "attempting" new and complicated recipes or watching her favourite animated movies.