This book allows students to learn fundamental concepts in linear circuit analysis using a well-developed methodology that has been carefully refined through classroom use. Applying his many years of teaching experience, the author focuses the reader's attention on basic circuit concepts and modern analysis methods. He systematically unfolds each idea covering studies of basics of different terminologies used in electric circuits, mesh and node equations, network analysis and network theorems. Signals and their properties have been discussed. Graph theory and its application in circuit analysis has been emphasized. Analogous systems are discussed. Fourier transform, Laplace transforms and their applications in circuit theory have been thoroughly discussed. Wide coverage of convolution integral has been made. Two-port networks, passive and active filters, state variable formulation of network problems have been emphasized. Network synthesis has been covered. Transient response and frequency-domain analysis of network systems have been discussed.