Does anyone know of any good books on stoicism? I was introduced to the philosophy not too long ago, and I find it interesting. I have just begun my journey on true self-improvement as of 2019, and wanted to read up on how to strengthen my ability to resolve situations logically. I’m looking for something not too expensive: no more than $40. If you have any other suggestions on some books to help with my self-improvement, please provide those as well. Thank you in advance.

-Excophous