It wasn't what I expected. I thought it would be full of the magic of Merlyn ... but instead it was about the philosphy of war and how man differs from the animals. Although I did find the Pros for war thought-provoking. It repeats the two parts from "The Once and Future King" where Arthur joins the ants and geese. It's more clear about Arthur's death ... yet also includes all the theories of how he's still alive. Perhaps a little too serious for a fantasy.
I LOVED this book as a teenager. Since I have not read it in at least 25 years, I will borrow a review from Amazon:
A Wonderful Piece of Wizardry, January 12, 2000
Reviewer: McCartnoid7@hotmail.com (Harveys Lake, Pennsylvania United States)
The Book of Merlyn was an incredible book, once again proving the genius of T.H. White. This book is the only sensible conclusion to the Once and Future King and should have been included in the original printing. In The Book of Merlyn, we revisit King Arthur on the night before his final battle with his son, Mordred. Feeling dejected and alone, Arthur's mentor, the lovably eccentric and ingenious Merlyn, returns and whisks the king away to learn two final lessons from the animals he knew as a child. This book is not merely a childish fairytale, but rather an in-depth dissection of human nature in which the human condition is explored in depth and the ever-elusive meaning of life is hinted at. A book for the serious reader or any serious fan of Arthur and Merlyn, The Book of Merlyn is a masterpiece from the mind of one of the greatest writers of the past one hundred years.