I loved
Black and Blue Magic as a kid growing up, but although I remembered the story, I had long since forgotten the name/author of the book. I was pleasantly surprised to find it as one of Open Road's "extra" Friday deals today at Kindle US for $0.99. Per the Open Road webpage for the sale, it is also supposed to be $0.99 at BN and Google Books, but I haven't verified.
link:
https://www.amazon.com/Black-Magic-Z...dp/B00A72710I/