It’s good to celebrate the accomplishment of finishing a book. Usually (unless you are HIGHLY disciplined) that means the book had something to offer that you could use at the current point of your life. I think equally as important as celebrating the books we finish is celebrating the books we gave up on. It’s not laziness or lack of perseverance, but rather, the recognition that that book just didn’t help with the problem at hand.
It’s not that they were bad, they just didn’t help me with the problem I was trying to solve or a viewpoint I was trying to crystallize.
Mindful Way Through Anxiety
The Purpose-Driven Life
7 Habits of Highly Successful People