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Make sure you are searching for the correct edition. The 2nd edition (2006) is widely available in used book markets for as little as INR 100. The 5th/6th editions have updated examples including digital control snippets. control system engineering by ij nagrath pdf
The authors have a knack for breaking down complicated topics like State Space Analysis and Nyquist Plots into digestible segments. The progression from basic open-loop systems to advanced feedback control is logical and intuitive. You do not need to steal the PDF