@raheel1 you're welcome.
when i check about books of Northern Pakistan in shelf i found three books . One in Lonely Planet (northren Pakistan Traveling Guide) by John Mock, (Norhren pakistan treks)By Ishabal Shaw and Ben shaw, and the third one was Foot Prints (Northren Pakistan) by Dave Winter , i select the Foot Prints one. you can buy any one book of the following which ever is available easily.
My Guide book told me about a couple of hotels but the one which is run by a mountaineer guy who runs mountaineer expeditions was found better , it have several rooms accurding to anyone's requirement and home stay with the native shimshalis is quite possible if you are with family as Mustansir sahab was done the same.