1. Mathematical Prerequisites --;pt. I. Structures with Incomplete Information --;2. Structures of Information --;3. Information Relations Derived from Information Systems --;4. Information Operators Derived from Information Systems --;pt. II. Introduction to Information Logics --;5. Towards Information Logics --;6. Techniques for Information Logics --;pt. III. Proof Systems for Information Logics --;7. Reasoning About Similarity --;8. Reasoning About Indiscernibility --;9. Reasoning About Knowledge --;pt. IV. Computational Aspects of Information Logics --;10. Information Logics Versus Standard Model Logics --;11. Decidability of Information Logics --;12. Complexity of Information Logics --;pt. V. Representability and Duality --;13. Informational Representability --;14. Informational Interpretation of Standard Algebraic Structures --;15. Information Algebras.