Preface. 1. Introduction to QCD sum rules: Historical survey and physical picture. 1.1. Status of QCD as the theory of hadrons. 1.2. Problems and perspectives. 1.3. Physical picture underlying the sum rule approach. 2. Foundations of the QCD sum rule method and sample applications. Papers by: M.A. Shifman, A.I. Vainshtein, V.I. Zakharov. 3. Coefficients in the operator product expansion. Papers by: C. Cronström, M.S. Dubovikov, W. Hubschmid, S. Mallik. V.A. Novikov, M.A. Shifman, A.V. Smilga, A.I. Vainshtein, V.I. Zakharov. 4. Heavy quarks in the sum rules. Pre-Coulombic behavior. Papers by: H. Leutwyler, L.J. Reinders, H.R. Rubinstein, M.B. Voloshin and S. Yazaki. 5. Baryons. Papers by: B.L. Ioffe, L.J. Reinders, H.R. Rubinstein, S. Yazaki. 6. Form factors at intermediate Q2. Papers by: B.L. Ioffe, V.A. Nesterenko, A.V. Radyushkin, A.V. Smilga. 7. Hadrons in external fields: static characteristics (magnetic moments, charge radii and all that). Papers by: V.M. Belyaev, B.L. Ioffe, Ya.I. Kogan, V.A. Nesterenko, A.V. Radyushkin, A.V. Smilga. 8. Multicolor chromodynamics and the sum rules. 8.1. The limit of a large number of colors. 8.2. Meson properties. 8.3. Experimental indications. 8.4. Where the naive N¯c counting fails? 8.5. Bags. 8.6. Factorization. 8.7. Baryons in multicolored QCD. 9. Survey of new trends. Papers by: V.L. Chernyak, A.V. Smilga.