I have always had the impression that he wrote adult books. His first book that I read was a Hardcover book which housed 6 of his famous book - "Kiss Kiss; Over to You; Switch Bitch; Someone Like You; Four Tales of the Unexpected; My Uncle Oswald". I love those.
I bought More About Boy: Roald Dahl's Tales From Childhood from Book Tree not long ago. Obvious from the title, the story is about his childhood staring with his Norwegian father who travel away from his village and had become a successful man. His first wife pass away and during one of his trip back to his homeland, he married Roald Dahl's mother.
His father pass away when he was young but his mother held on with the family and believe that education British education is the best. He was sent to a boarding school till he graduated.
There are plenty of photographs and letters that his mother kept, printed here.
There were also School Report/Report Card from his school to his mother which mentioned that his "idea limited" "consistently idle: too pleased with himself" "I have never met anyone who so persistently wrote words meaning the exact opposite of what he obviously intended".
For me this is certainly and entertaining book.
Have you read Enid Blyton "Malory Tower Series" and "St Claire Series"? or Elinor Brent-Dyer's "The Chalet School Series"? The stories about boarding school, pranks and the school master/mistress are fictional. If you enjoy them, then you will surely enjoy reading about Roald Dahl's experience with boarding school.
I give this book 4 stars out of 5. It's a keeper.