Hi Amit:
Select the files you want to modify in the book window (it might be the entire book, but it also might just be the second and subsequent chapters), then, right, click and choose pagination and set it up as follows and the update your book.

But then you need to check your master pages. If you're using a custom first master page (likely designed for a right page), you need to make sure that you assign a custom left master page to the chapters that begin on a left page or your page numbers are going to be on the wrong side when you output your book.
~Barb