Fundamentals of Digital Logic & Circuit Design: From Boolean Logic to Sequential Circuits provides a clear and progressive introduction to the principles, analysis, and design of digital electronic systems. The book begins with the fundamentals of digital electronics and gradually develops the reader’s understanding of more advanced combinational and sequential circuit design. The early chapters introduce number systems, binary arithmetic, digital codes, signed-number representation, and floating-point representation. These topics explain how numerical and symbolic information is represented, processed, stored, and communicated in digital systems. The discussion then moves to Boolean algebra, truth tables, logic gates, canonical forms, Karnaugh maps, logic simplification, gate conversion, and systematic methods for analyzing and synthesizing combinational circuits. Practical combinational circuits include adders, subtractors, comparators, encoders, decoders, multiplexers, demultiplexers, code converters, parity generators, and parity checkers. These examples show how basic logic gates can be combined to perform useful arithmetic, comparison, data selection, display, and error detection functions. The later chapters focus on sequential logic circuits and the role of memory in digital systems. Readers are introduced to latches, SR, D, and JK flip-flops, propagation delay, asynchronous inputs, and ripple counters. The book then develops the analysis and design of synchronous counters using state-transition tables, state diagrams, excitation requirements, timing waveforms, and Boolean simplification.