I'm wondering if you're familiar with the Moomin books, by Tove Jansson. There are nine of them, written in Swedish between the years 1945 and 1970, all of which have been translated into English.
As for why I recommend them, here are my scattered thoughts.
Despite being written for children, these are beautifully evocative and deeply introspective works, dealing with themes of belonging and coping with upheaval and loss. These are adventure stories, but the conflict is almost always internal - in the early books, inspired by Jansson's childhood experience in wartime and post-war Europe, the Moomins contend with floods, comets, and volcanoes. None of these are stoppable, and saving the world is never on the agenda. Instead, the Moomins struggle to survive, with their way of life intact. The later books are more personal and some say darker, and deal with change, as expressed in seasonality, and the comings and goings of particular characters. The last book in particular, Moominvalley in November, is a sober and entirely serious examination of loss and the challenge of letting go, which completely went over my head when I was a kid, but which, in retrospect, was probably the best entry in the series. Jansson made the jump to non-fantastical fiction after writing it.
And yet these are lighthearted and beautiful books as well, centered upon the warm and accepting Moomin family, and taking place in the utterly magical and yet strangely familiar and naturalistic Moomin Valley.
I'm in the process of rereading them right now, and I thought about this website (which has helped me find many a wonderful read in the past) and wondered whether or not you were familiar with them. If not, I highly recommend them.