If you can solve every problem in the "Unsolved Problems" section of Kothari, you will pass any university exam and most technical interviews at utility companies.

Here is why you should consider adding this PDF (or physical copy) to your library:

The chapter on Gauss-Seidel and Newton-Raphson methods is the highlight. The authors don't just show the algorithm; they explain why Newton-Raphson converges faster and how to handle PV buses. If you are preparing for GATE or competitive exams, these chapters are mandatory reading.