This book has got all the question papers form 1997 to 2011 but the circuit figures and the circuit elements parameters are not clear and there are lot of spelling mistakes that may lead to misunderstanding of the question. Few important values in the circuit figures are not mentioned...i don`t know whether this was the condition in the IES question paper given in the exam hall. Half of the answers are wrong. You cannot trust the solution given in this book.Different answers for the same ques...