Sir, this book was bought by the army and then have been kept in the store rooms since as it was against the Pakistani narrative of its victory in 65. You might not get it now. I did see ut in father's unit office cabinet in Rawalpindi a couple of years ago but unfortunately i was a bit young to read it fully. Instead i read 2 or 3 other books that were also present there. Quite bulky though. I bow resent my decision but i was only in 9th class then. Still, itbwas a very detailed book with maps and ORBATS etc.
Instead I would recommend you to read:
-Tragedy of Errors, East Pakistan Crisis- Lt Gen Kamal Matinuddin
-Crossed Swords: Pakistan, Its Army, and the Wars Within- Shuja Nawaz