Here are some of my favorite mathematics texts.
High School Math: the Art of Problem Solving books
Linear Algebra: Linear Algebra Done Right, Axler
Algebra, in general: A Book of Abstract Algebra, Pinter; Algebra, Lang
Galois Theory: Galois Theory Through Exercises, Brzezinski; Lang’s Algebra Ch. 5-6
Commutative Algebra: Introduction to Commutative Algebra, Atiyah-Macdonald, Commutative Algebra with a View Toward Algebraic Geometry, Eisenbud
Algebraic Geometry: Foundations of Algebraic Geometry, Vakil; Algebraic Geometry, Hartshorne
Arithmetic Geometry: Rational Points on Varieties, Poonen
Point-Set Topology: Topology, Munkres
Algebraic Topology: A Concise Course in Algebraic Topology, May; Characteristic Classes, Milnor-Stasheff
Analysis: Principles of Mathematical Analysis, Rudin