  1. QCD Sum Rules: 20 Years After;
  2. QCD Vacuum and Basics of the SVZ Method:
  2.1 General ideas; 2.2. Getting started/Playing with toy models;
  3. Vacuum Condensates;
  4. Rho Meson in QCD;
  5. Basic Theoretical Instrument -- Wilson's OPE;
  6. Practical Version of OPE;
  7. Low Energy Theorems;
  8. Are All Hadrons Alike?
  9. Ecological Niche;
  10. New Developments:
  10.1 Light-cone sum rules; 10.2 Heavy flavor sum rules;
  11. Sum Rules and Lattices;
  12. Vacuum Fluctuations are Subtle Creatures;
  13. Instead of Conclusions.
