Tales from Moominvalley

by Norton Juster

Like Jansson, Juster builds a world where linguistic and logical absurdities are treated with complete seriousness—your protagonist stumbles into kingdoms where you can literally consume words and numbers. Both authors share that particular gift of making impossible situations feel cozy and inevitable, with humor that works equally well for children and adults noticing the clever wordplay.

by Erin Morgenstern

This one's my surprise pick for you—it shares Moominvalley's atmospheric richness and sense of wonder, but trades the cozy family dynamic for a more grown-up romance woven through an impossible magical competition. Morgenstern writes with the same attention to sensory detail and emotional truth that makes Jansson's smaller moments (like Ninny's invisibility) feel genuinely moving rather than just fantastical.

by John Bellairs

Bellairs captures that same balance of genuine creepiness and fundamental coziness—his orphan protagonist discovers a house full of magical mysteries, but the real heart of the story is about belonging and found family, much like how the Moomins' adventures always circle back to their valley as sanctuary. The pacing has that episodic quality you enjoyed, with each chapter feeling like its own small story.

by Diana Wynne Jones

Jones writes with Jansson's same deadpan approach to the surreal—her heroine gets trapped in a wizard's enchanted castle and responds to increasingly bizarre situations with practical exasperation rather than awe. Both authors understand that the best fantasy humor comes from characters who treat magic as just another inconvenient fact of life, like weather or difficult relatives.

by Andrew Lang

Published in 1889, this collection predates your book by over a century, but it's the spiritual ancestor of Jansson's approach—fairy tales told with brisk efficiency and genuine strangeness, where dragons and invisible girls and magical transformations happen as naturally as rain. Lang's tales have that same quality of treating the fantastical as mundane, which is precisely what makes them feel so real.