Books with title Muddy, Mud, Bud

One day there was a deer named Buddy. Not long ago he met Mirrie, who is a fairy. He rescued her while she was in trouble. Mirrie has promised him that she will also help him when he is in need. She realized that she can make wishes come true. Only sorry that she cannot make her own wishes come true. She also just can help her very best friends' wishes to come true. One day Buddy decided that he no longer wants to be a deer because he is already two years long a deer and is now tired to be one. It gets bored to just eat leaves every day. He decided to go to the fairy and ask her to help him. Mirrie will help him as she had promised. He is by the way one of her best friends.