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# Pure Mathematics / Geometry

- Harshorne - Algebraic Geometry

- Bott, Tu - Differential Forms in Algebraic Topology

- Milnor, Stasheff - Characteristic Classes

- Milnor - Morse Theory

- Serre - Linear Representations of Finite Groups

- Fulton - Intersection Theory

Differential Forms in Algebraic Topology might be one of the best math books ever written.

I’ll add Milnor’s Topology from the Differential Viewpoint and/or Differential Topology by Guillemin and Pollack.

Another chime for Differential Topology. It's incredibly readable and accessible (given the subject).

Milnor is a wonderful writer, in his books as well as his papers.