Simplify the following text for a Grade 9 native English-speaking person.
Original: Based primarily on family papers and letters , it is described by Austen biographer Park Honan as `` accurate , staid , reliable , and at times vivid and suggestive '' .
Simplified: It was based mostly on family papers and letters . It is described by Austen biographer Park Honan as `` accuracy , staid ( steady ) , reliability , and at times vivid and suggestive '' .