premise: Barry Cunningham (born 19 December 1952) is a British publisher, who worked for various publishers including Penguin Books and Bloomsbury before setting up Chicken House publishing in 2000. He is most well known for signing J.K Rowling, and publishing "Harry Potter and the Philosopher’s Stone" in 1997.
hypothesis: Barry Cunningham is most proud of signing J.K Rowling, and publishing "Harry Potter and the Philosopher’s Stone" in 1997.
reason: The text doesn't specify if signing JK Rowling is the thing he is most proud of, just most well known for.