Feedback on "book summary" originated from master's thesis I am transforming my Mater thesis into a book. I need to write a 100 word summary for the same as well. Should I be mentioning in my book that it is an extension of my Master's thesis? The following is the relevant excerpt from my book summary.

"This book, which originates from author’s master’s thesis, discusses laser-based ultrasonic NDT method."
Personally I would not refer to your master thesis in your abstract. Often books are recommended based on an author’s life long in depth experience in a field. In your case I would look for recommendations of professors and put those on the cover of your book.