Study of category and functor

Question

I am going to start study of Category and Functors and sheaf theory. What are good text/ lecture notes to start with?

I have not done any prior course on category theory and homological algebra or Algebraic topology. But I had done courses in Group, rings, modules, galois theory, little bit of algebraic geometry, and point set topology.

Answer 1

Depending on your current level, you may find Part I of Ravi Vakil's notes on algebraic geometry useful. I find them extremely readable, and you may also be interested in how these theories are applied in the rest of the notes.

Answer 2

I recommend Saunders Mac Lane's book "Categories for the Working Mathematician".