Book writing & publishing

How can we use the Books option under the write-publish menu? What is the purpose of this option?

It's a collaborative(সমন্বিত) writing option with the planned, pre-decided topic and additional features (printer friendly, chapter/page navigation etc). Like any other contents we can add a book page for the book that we are interested/agreed to write. Title-chapter-page etc. can be re-order at any stage. 

Banglaworld.org has option to write public book title (e.g your worldwide experience) and private writing option. 

Book editor can edit/organize the index and chapter.