Books for helping to overcome depression, social anxiety and generally just finding purpose in life?

I'm 28 years old and, even though I'm by all accounts alive, I'm not living. Never have, really. Ever since about elementary school, I've never had a social life. Never got invited to birthday parties, never got into misadventures, none of the things most adults probably look back fondly on now. That wasn't me.

This over time evolved into the deep depression I find myself in now. And nothing much has changed between childhood and now. Even though I got through college and have a stable job, I'm still alone. I simultaneously feel like I'm just better off staying like this, but at the same time feel like I'm not. I can't quite explain it. I have tried therapists and, while both I've had were fine, I stopped seeing them for private reasons (I also called 988 last month when I was out somewhere).

So until I can actually afford to go see one again, I'm just here being me. I'm just looking for a book that can hopefully be a sort of road map to helping me change and get better. I read some of Feeling Good by David Burns but found it to be too akin to a textbook. Well written, definitely though. But I want something more "casual" for lack of a better term. Something eye opening, if possible.

I'm open to whatever