Etta lived on the edge of town where the river bent like a curved graph. She kept a small shop of odd things: brass compasses, old slide rules, and stacks of notebooks filled with looping symbols. People came for repairs; children came for candy and stories. Mathematicians came for the one thing no one else sold—polynomials.
Polynomials: A Problem Book by Edward J. Barbeau is a classic in the Problem Books in Mathematics polynomials by barbeau pdf
Use this as a study map—chapter titles may vary by edition. Diving into the Depths: Why "Polynomials" by Edward J