Since you mention algebraic geometry, here are some Springer books that I use frequently:
- Algebraic Geometry: Hartshorne, Robin
- Geometric Invariant Theory: Mumford, David, Fogarty, John, Kirwan, Frances
- Geometry of Algebraic Curves Volume I: Arbarello, E., Cornalba, M., Griffiths, P., Harris, J.D.
- Positivity in Algebraic Geometry I & II: Lazarsfeld, R.K.