Moominland Midwinter (Swedish title: Trollvinter) is the sixth in the series of Tove Jansson's Moomin books, published in 1957.

[1] While the rest of the Moomin family are in the deep slumber of their winter hibernation, Moomintroll finds himself awake and unable to get back to sleep.

Moomintroll is lonely at first but soon meets Too-ticky, a wise spirit who sings mysterious songs, and his old friend Little My (who takes delight in sledging down the snowy hills on Moominmamma's silver tea tray).

As the haunting winter progresses, many characters (notably the Groke, Sorry-oo the small dog, and a boisterous skiing Hemulen) come to Moominvalley in search of warmth, shelter and Moominmamma's stores of jam.

"[2] In Tove Jansson, W. Glyn Jones agrees, "The absolute and unquestioned reality of the world of childhood now becomes less clearly defined, something a growing Moomintroll can question.