An interactive book that builds circuit basics step by step from the electrical engineering lessons: circuit terms (branch, node, loop, mesh, super node and super mesh), the voltage and current dividers and the rule that current follows the smaller resistance, series/parallel and capacitor/inductor facts in DC, the essence of nodal and mesh analysis with worked examples, and Y–Δ conversions for circuits with no series or parallel — with graded exercises, hints and detailed solutions.