I remember two books of short stories, a part one and two though I cannot remember any part of the titles. They were hardcover and fairly large, the spines were at least half an inch thick. One was blue and one was yellow, and the books were illustrated in color. The biggest problem I have had in searching for them is that the stories I remember are not ones I have heard anywhere else. It is very possible that they contain well know stories as well, but I cannot be sure. One story has some humble person who needs something from a kingly man. The man likes riddles and makes a riddle something like, you must come back here not on foot or on horseback, not clothed but not naked, and not empty handed or with a gift. A little girl (his daughter I believe) solves this riddle by coming back riding a hare, wearing a fishing net, and holding a bird. I remember a picture of that scene. I think it was actually a second riddle, I don’t remember the first part. Another story I remember less of has a misbehaving boy who takes a deep breath through his mouth and inhales a tiny man (or two possibly). The man or creature talks to him and I cannot remember if he was good or bad but the boy stops misbehaving (possibly yelling too much) in the end.
I cannot remember anything else at the moment. but hopefully you all will have more luck that I have so far.