Ancient Chinese Book

Do you know how old the book might be, or whats the book about, to me it looks like it could possibly be from the early 1800's to the mid 1800's, it looks as if the writing is on rice paper, it would help establish what the book is worth, especially if it's an heirloom of your family. I cannot quit see the seal, or calligraphy mark in the second photo very well, that would perhaps help you date the book to what Dynasty period it is from, or possibly if it is of Dynasty. 

It would definately help you get a fair price for the book, be safe not sorry, friend, [email protected]