"Chatter" by Ethan Kross

The author suggests that the voices in our heads can be both beneficial and detrimental. Interestingly, around 50% to 80% of people do not have a voice in their heads! This probably means that this book is suitable for only a minority of people (I'm joking, inner monologue is not the only thing that can be called "chatter").

Chatter can spiral out of control and get one into a negative loop of thinking bad thoughts repeatedly. Interestingly, most of these evil thoughts are self-inflicted, causing increased anxiety. The author suggests three ways to mitigate the damage:

1. Don't overfeed your mind with ideas; practice mental hygiene
2. In the challenging times, zoom out and realize that the adverse events aren't the norm but exceptions
3. Talking issues through isn't enough — one has to seek external advice and help (or at least give advice to oneself pretending to be another person)

I don't see why I wouldn't recommend "Chatter." It's a solid book with a peculiar yet useful concept behind it. It is also short enough to give a reader the best ratio of practical knowledge to time spent. So read it!