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.