Thanks to all for the advice.

Dear Inna,
Thanks for your reply. I'm going to look for an effect is to make the no. of pages of a book to be dynamic. Everytime when the book load, it reads the updated page and content information from the website, then the pages and content for the book can be refreshed. Or, in relation to this, is there a function to download a book from internet and open it on the device, similar to a bookshell ? Thanks.