Think some people here can benefit from reading these two:

https://www.amazon.com/Awareness-Opportunities-Reality-Antho...

https://www.amazon.com/Courage-Be-Disliked-Phenomenon-Happin...

Why? They help to rewire your brain and help you detach from a lot of the things and ideas. Not a silver bullet (depression is one of several, natural, human states) but may help some who want to avoid the pharmacological route.

My favorite introspective book is Awareness, By Anthony DeMello[1]

It is a small book but it really makes you think about your views on life.

[1] https://www.amazon.com/Awareness-Opportunities-Reality-Antho...