The Happiness Project by Gretchen Rubin
Published 2009 · 79,475 words · about 4 hours at an average pace
How hard is The Happiness Project to read?
The Happiness Project scores 29 out of 100 for difficulty on ReadingRate, making it relatively accessible. The score is a weighted composite of nine measures: four of how hard the prose is to parse, five of how hard the meaning is to extract.