TheWind in the Willows by Kenneth Grahame, first published in 1908, has lasted through generations of readers. It's been adapted for the stage and screen. The book I have is the 1996 edition with illustrations by Rene Cloke. It struck me a rambling narrative, written without the expectations of contemporary fiction. It felt to me like reading someone's journal. This is the first time I've searched for an opinion about a book, and I found one at "What on Earth is the Wind in the Willows" by Peter Hunt. Hunt suggests that "The Wind in the Willows is an allegorical self-portrait: all the main characters can be seen as facets of Grahame." Hunt claims that "neither the author nor the publisher thought it was a children’s book." Well, whatever it is, The Wind in the Willows has staying power.
OUPblog:
Oxford University Press's Academic Insights for the Thinking World. August 18,
2010, https://blog.oup.com/2010/08/wind-in-the-willows/