* "The Wonderful Story of Henry Sugar and Six More" (2002): This collection of short stories was published posthumously and includes a mix of fantasy, suspense, and dark humor.
* "My Uncle Oswald" (1979): A satirical and scandalous novel about a man's wild and eccentric adventures, filled with sex, drugs, and espionage.
* "Going Solo" (1986): An autobiographical account of Dahl's early life and his experiences as a fighter pilot during World War II.
* "Boy: Tales of Childhood" (1984): A semi-autobiographical novel about Dahl's childhood experiences in Wales and boarding school.
* "Danny the Champion of the World" (1975): While considered a children's book, it explores themes of poverty, family, and the relationship between a father and son. This novel, along with some of his other works, can be considered as having some elements of adult themes, even if they are aimed at a younger audience.
It's worth noting that Dahl's adult novels are not as widely read as his children's books, but they offer a different perspective on his writing style and his own experiences. They also demonstrate his versatility as a writer, capable of tackling mature themes with wit and ingenuity.