Brenna Hassett is an archaeologist and anthropologist who researches the history of childhood. As a lecturer at the University of Central Lancashire and a Scientific Associate at the Natural History Museum London, she splits her time between rural Lancashire, London and different archaeological projects around the world in places such as Greece, Turkey, Egypt and Thailand. She is the author of the 2016 Times UK Top 10 Science book Built on Bones: 15,000 Years of Urban Life and Death and Growing Up Human: The Evolution of Childhood for adults, and is the voice of science for Totally Chaotic History: The Stone Age Runs Wild!, the (pre)-history book for kids by Greg Jenner.

Rikin Parekh worked as a Film Production Illustrator on monster movies before turning to children's book illustration. His books include the Iguana Boy series, The Worst Class in the World books and Fly, Tiger, Fly!. He has collaborated with author Caroline Green for There's a Dog in my Brain! and There's a Dog in my Brain: Dog Show Disaster, illustrated for Greg Jenner's Totally Chaotic History series and teamed up with author Lorna Watson for Rabbit on the Rampage. He lives in London. Find him online at rikinparekh.com, on X as @r1k1n and on Instagram as @r1k1n_parekh.