[image from: diythemes.com]

This is how a book is defferent that a thesis (combined from various sources)

• A book doesn’t actually need an original theory. It needs an original view point. So you can freely bring your own perspective.
• A book has a broader (general) readers, so you have to provoke and engage them to read your book.
• General book-readers are simply want to know what you’ve found out and what you think about it. Offcourse you need to include your references as a basis, but your readers will focus on what you’re saying.

So several sources recommend to do the following tasks:

• remove all academic “scaffolding” and focus on your own opinion. Reduce scholarly aparatus.
• reorganize to make it more interesting to read; refocus your story.
• rewrite with more direct and personal voice: use first person story telling (I or We) and use active voice.