What's the book with a series of stories involving a man reincarnated as a wolf?

Strange question, I know, but it's something that I read in middle school around 97-98. It was like a collection of different stories (kind of like ghost stories) but it was tied together (if I'm remembering correctly) with this guy that was trapped inside this wolf and ended with him like leaving his home behind and running with the other wolves. It had to be a teen kind of book, something on the 7th, 8th grade level probably. Two stories that I can remember (a little) had something to do with a graveyard and then another one in a school clroom at night. Not much to go on, I know. If I remember anything else, I'll put it on here. Thanks!