A motivating, inspiring book. You can read it within a couple of hours, but you cannot because you took it from the library or want to pass it over to a friend who also needs inspiration which I gave to my little one for the purpose of increasing his reading skills and motivation.
Overall, if you are reading philosophy or sci-fiction, and want something easy and helpful, this book would be a perfect choice.
Also, you could watch Austin Kleon`s TEDx speech.