Molly Knox Ostertag

Molly Knox Ostertag is a cartoonist and writer based in Los Angeles who creates graphic novels for middle-grade and teen readers. Ostertag's middle-grade debut, The Witch Boy (2017), about a boy in a magical family who wants to learn witchcraft, began a trilogy continued in The Hidden Witch (2018) and The Midwinter Witch (2019), and it is being adapted as an animated feature for Netflix.

The Girl from the Sea (2021) and The Deep Dark (2024), both for teen readers, explore first love, family and secrets. The Deep Dark, first serialized in Ostertag's newsletter, received a 2025 Michael L. Printz Honor and was a 2025 Hugo Award finalist. Ostertag also wrote the Dungeon Club graphic novel series, illustrated by Xanthe Bouma.

In animation, Ostertag wrote an episode of The Owl House, and earlier comics work received the Ignatz Award and the Prism Award.