Missions & their solution

[Runny]

Now , don't understand me wrong , the mission make's me sad because i don't know how to do it . It's like this : search the book of Koans , it says that he lost it at the prison ...but where to search it ? And another question : What can i do whit user manual for rifles , Mp5, granade luncher , and so on ? How can i take advantage of them ?