It is a very Nice Book. It Covers almost all the topics like, General Intelligence, General Knowledge, English Grammar, Reasoning for the said posts, Lower Division Clerk, Postal Stamp sorting officer, Data entry operator, Data entry operator II.
I have also this book and it is very easy to understand. You can cover all the topics in short Time. It does not matter how busy you are with the help of this book you can prepare all the topics in a very short time.
It is best for CHSL Examination and if you are willing or already applied for this Examination then it would be very helpful for your guidance and to crack your Examination.