Moomins are my greatest inspiration when it comes to drawing characters and making up stories (not always, but if I could draw like Tove, I would draw like Tove)
If somebody asks me about the most important book I've read in my whole life, I would probably say that's one of the books of Moomin series. Most probably that one about Winter.
Btw after I've re-read every single book again a year ago, I was amazed how many levels there are in these books. I just feel these books. So amazing.