This is a quiz similar to Vadercookies' 'Initials' quizzes, so I decided to make one like his. I asked beforehand, so it's all good. I will give you the initials and author of a famous book, you name the book.
Many authors have chosen to write under a pen name. Some of them want to conceal their identities, others use pen names when writing in different genres. Check how many pen names of famous authors you know.