Blog post that look like pages in open book

[MJ]

Hello, 

I have an idea for a simple blog site that look like a open book. For a simple prototype this is only text nothing fancy, no animation of turning page and so on. But I stumble on a problem with presenting simple text. 

First I assume that every page in the "book" is diffrent post/object but what if the text is too long to fit one page. I so than text should go to another page, but how to do this with a single post ? 

How to tell when text should go do another page ?

I struggle where to look in django for answers is this some magic in models ? in templates ?