I just finished reading Diary of a Fly and Diary of a Spider. I have long been an admirer of Cronin's first book Diary of a Worm, and often use that as a mentor text for journal writing. Now, I think it would be interesting to compare the points of view of each book, which is a Common Core standard.
For an adult read, I highly recommend The Dip by Seth Godin. Truly motivating for anyone. Godin emphasizes pushing yourself vs. settling for being mediocre. And who doesn't need to be reminded of that?