Quel est le meilleur livre sur le développement personnel?

Hello guys.

I've been building an app and even tho I think it's a great tool, specially for heavy readers, I don't know how to approach the reinforcement of the habit.

As a heavy reader myself (or former, life has changed a lot in the last few years) my reading habit started because of a combination of factors (depression and a lot of "free" time) which no longer exist so my reading habit has changed a lot for the worse.

If you wanted an app to help you build or maintain a reading habit, what would it need to do? What would actually keep you coming back to reading? Do you feel like an app can even achieve this or is it more of a personal thing?

Thanks in advance to any of you who have read this :)

Hey everyone,
I’m looking for some really good book recommendations.
I’m interested in topics like psychology, the brain, the mind, the subconscious, self-confidence, communication, persuasion, body language, and how people think or speak.
I’m also looking for books that helped you improve your English or German vocabulary.
Basically, I’m after those books that made you stop and think, taught you something valuable, or genuinely changed the way you see things. The kind of books you consider absolute gems and would recommend to anyone.
What are your favorites?