19958
It went on to praise the book as " austere but vivid " , and said the series was more thoughtful than the " Narnia " books by C. S. Lewis .
 C. S. Lewis
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 C. S. Lewis