This particular book was part of a series put out in the late 60's and early 70's by Classic Publishing Corporation. For a full listing of the book titles in the series and more information, click here. I purchased this book at a thrift store for the hefty sum of $5. (I'm cheap.) They had a couple of other titles in the series there, but I decided to wait and see if I can find them elsewhere for less, as I'd like to get the entire series.
I wasn't able to find much information about Brigitte Bryan, but here is a link showing another book she illustrated with a bit of info on the dust jacket. For information about Don Irwin, click here. For information about the different illustrators of Alice in Wonderland, click here. Also, check out the sidebar on my blog (on the right) with more links.