Here's a kid-friendly easy-to-read bio of Pat Brisson.
Want to learn more?
You can read her essay "Writing for Children: One Author's Experience" which was included in the book Ways of Knowing: Literature and the Intellectual Life of Children, editied by Kay E. Vandergrift (1996). In it, Pat discusses why she writes, where she gets her ideas from and the process of writing her first few books. You can read the essay here.
Also, see the entry in SOMETHING ABOUT THE AUTHOR, Volume 133, pages 13-15 and the autobiography feature in the same volume, pages 16-28