Berkley Books is an imprint of Penguin Group (USA) that began as an independent company in 1955. It was established by Charles Byrne and Frederick Klein, who were working for Avon and formed "Chic News Company". They renamed it Berkley Publishing Co. in 1955. They soon found a niche in science fiction works. They were bought out in 1965 by G. P. Putnam's Sons and became their paperback publisher.
Wikipedia contributors. (2018, July 24). Berkley Books. In Wikipedia, The Free Encyclopedia. Retrieved 09:00, August 7, 2018, from https://en.wikipedia.org/w/index.php?title=Berkley_Books&oldid=851785866