Brian David Sibley (born July 14th, 1949 in Wandsworth, England) is an English biographer, author and radio personality. He is most known for writing documentaries and biographies for books and radio shows, including the "Harry Potter" series, the "Hobbit" and "Lord of the Rings" series, and Disney. He is also known for working at BBC Radio.
He wrote The Thomas the Tank Engine Man, the biography of the Rev. W. Awdry, both in book form and as an early program for BBC Radio 4. The former had been out of stock for years after it's publication, however an updated edition of the book is republished for May 2015 by Lion Books to coincide the 70th anniversary of The Railway Series. After the Reverend passed away on the 21st of March 1997, Sibley wrote an obituary of him for The Independent.
He is also known for bonus features in recent releases of Disney films on DVD and Blu-ray.