After every financial crisis, there is always a period of sobriety with a search for alternatives and often more stable forms of investment such as real estate, bonds, precious metals, artworks, or insurance programs. "The Investor's Alphabet" introduces the basic concepts, but mainly emphasizes the meaning and principles of investments, the way the investor should think, transact, and make decisions on how to upgrade their performance according to their available resources, needs, character, and plans. Beyond these central principles, the new book by economist-author Dimitris Dimopoulos helps the investor define their profile and identify the most suitable investment categories. It then presents in detail the available categories so that the selection and composition can be made in accordance with their investment profile, maximizing performance, minimizing risks, or taking into account other factors such as liquidity, taxation, and borrowing. The "Investor's Alphabet" does not omit reference to its duties, program, and methods of action. However, special emphasis is given to special psychology topics such as the development of investment discipline, combating investment anxiety, shaping a special lifestyle, positive investment thinking, and avoiding the reactions of the investment crowd. The "Investor's Alphabet" will answer the mainly private individuals' and income earners' inquiries, with the ultimate goal of being informed about applied scientific fields and practical advice, optimizing self-management of assets, and increasing their capital.