69856
The series was published between 1975 and 2010 , with the final , posthumous novel ( completed by Joan Hess ) appearing in 2017 .
 Joan Hess
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Joan Hess