C. S. Lewis
From Tardis Wiki, the free Doctor Who reference
C.S. Lewis was a writer inspired by a visit from the Eleventh Doctor and Amy Pond. They gave him a copy of a novel entitled The Professor, the Queen and the Bookshop. (DWM: The Professor, the Queen and the Bookshop)
Behind the scenes
C.S. Lewis died on the same day as the assassination of US President John F. Kennedy, 22 November 1963, which was also coincidentally the day before the very first broadcast of Doctor Who.
