The book i was looking for was actually RRB for Sr. Section Engineer, but instead i found this book. The book is good but i expected solved previous question papers and also for model questions there are answer but no hint answer, so you have to work it out yourself. But of course the book do give you a pattern of study and how one should prepare. Also flipkart gives you a 20% discount whereas in market you will get only 10% discount. Best of Luck everyone