Ideas and concepts of general topology are introduced through simple examples and then developed consistently. All essential terms are derived in a clear manner. The didactic structure follows the idea of "learn & check," which is why exercises of varying difficulty are provided at all important points, along with solution suggestions at the end of each chapter. Content includes: - Set-theoretical foundations - The concept of topological space - Topological constructions - Separation properties - Compactness - Connected spaces - Bibliography and index.