World War II Book

I am trying to find out the name of a book that a friend of the family wrote about his experience as a POW in World War II. Unfortunately, he has a common last name, Williams, so searching for the book is difficult to say the least. My grandfather is now deceased and no one else in the family knows the name of the book. I am planning to go to a local museum on my days off in the next couple of week. Supposedly there is a copy of the book there and I can at least get the title of the book.