Query: How many weeks did To Kill a Mockingbird remain on the bestsellers list when it won the Pulitzer Prize?
Context: During the years immediately following the novel's publication, Harper Lee enjoyed the attention its popularity garnered her, granting interviews, visiting schools, and attending events honoring the book. In 1961, when To Kill a Mockingbird was in its 41st week on the bestseller list, it was awarded the Pulitzer Prize, stunning Lee. It also won the Brotherhood Award of the National Conference of Christians and Jews in the same year, and the Paperback of the Year award from Bestsellers magazine in 1962.