which writer has the highest number of completed work Anne Perry or Judy Blume?
Judy Blume Judy Blume (born Judith Sussman; February 12, 1938) is an American writer known for children's and young adult (YA) fiction. Some of her best known works are "Are You There God? It's Me, Margaret" (1970), "Tales of a Fourth Grade Nothing" (1972), "Deenie" (1973), and "Blubber" (1974). "The New Yorker" has called her books "talismans that, for a significant segment of the American female population, marked the passage from childhood to adolescence."
Perry Rhodan Perry Rhodan is the eponymous hero of a German science fiction novel series which has been published each week since 8 September 1961 in the ‘Romanhefte’ format (digest-sized booklets, usually containing 66 pages, the German equivalent of the now-defunct American pulp magazine) by Pabel-Moewig Verlag, a subsidiary of Bauer Media Group. As of April 2017, more than 2900 booklet novels of the original series plus 850 spinoff novels of the sister series "" plus over 400 paperbacks and 200 hardcovers have been published, totalling over 300,000 pages. Having sold approximately two billion copies (in novella format) worldwide alone, (including over one billion in Germany), it is the most successful science fiction book series ever written. The first billion of worldwide sales was celebrated in 1986.