Endgame, by "LoGan". My older brother was into PUA stuff, I was dumped recently so he recommended me to read some things. All the other books and blogs were like "you have to do this one trick to get laid", but this book was a bit deeper. It changed my mind about being a happier and more fulfilled person by myself, and don't stress over being liked by other people, which in turn makes you more likeable.
Sounds like the right way to go! For further reading, look at:
Models - Mark Manson
No More Mr. Nice Guy - Robert Glover
What also helped change mindsets to positive-by-default interactions with potential partners, I recommend The Alabaster Girl by Zan Perrion. Very flowery book, but an enjoyable read and at worst a decent mode of mind to consider.
I don't know if I would recommend it liberally to anyone nowadays. But it influenced me a lot in how I perceive the world, myself and my relationships with other people.