10. Lois McMaster Bujold & Cordelia’s Honor [SF Women of the 20th Century]
 
http://tansyrr.com/tansywp/10-lois-mcmaster-bujold-cordelias-honor-sf-women-of-the-20th-century/

Lois McMaster Bujold is one of the most popular and celebrated SF writers still working today. She has won the Hugo for Best Novel four times, an achievement only equalled by Robert Heinlein. While she has published excellent fantasy fiction in recent years, it is her epic space opera series based on the Vorkosigan family for which she is best known.