a real world point of view
World Distributors (Manchester), Ltd later to be known as World International, Ltd. published Doctor Who annuals from September 1965 until 1985 (with the exception of the 1971 and 1972 Annuals). They also published the 1970s Dalek annual publications; they did not have a hand in the Annual-style Dalek books published in the 1960s. They also produced the one-off K9 Annual, as well as Doctor Who and the Invasion from Space, a 1966 release which was an original novella featuring the Doctor.
World Distributors also released a Doctor Who: Press-Out Book in 1977 /1978
The company was formed by three brothers; Sidney, John and Alfred Pemberton after World War II. Together they started selling second hand books before expanding into the publishing market.[source needed]