The book: The Cripple and the Staff .
Author: M M Mancey
available at Amazon (print and ebook).
Let me confess some bias here - the writer is my daughter. However it is a good read, better than many a fantasy book I have read over the years.
It does have some good reviews too. I only wrote one of them... An excellent first book. Needless to say there are very few Guyanese writers of fantasy or science fiction.