Avon Books was founded in 1941 by the American News Corporation (ANC) to create a rival to Pocket Books.
The early Avons were somewhat similar in appearance to the existing paperbacks of Pocket Books, resulting in an immediate and largely ineffective lawsuit by that company.
Avon's emphasis on "popular appeal" led them to publish ghost stories, fantasy novels, and SF in its early years.
As well as normal-sized paperbacks, Avon published digest-format paperbacks in series. Included in these series were Avon Fantasy Readers and Avon Science Fiction Readers.
From 1945 through the mid-1950s, Avon also published comic books. Its titles included SF and horror fiction.