Where can I find a good math textbook?

If you are a student still now, ask your friends and especially your teachers who I think are the best guides for this purpose. If you are an amateur in the subject, I would again suggest to consult with your friends and colleagues and also to seek the help of those who are interested in the subject.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.