Despite their tame storylines, Cartland's later novels were highly successful. By 1983, she rated the longest entry in "Who's Who" (though most of that article was a list of her books), and she was named the top-selling author in the world by the "Guinness Book of Records". Additionally, in 1976, Cartland wrote 23 novels, earning her the "Guinness World Record" for the most novels written in a single year. The 1970s and 1980s were her most prolific period; she also regularly appeared on television in that era.