What CMS you use for yours site build ?
All what I can propose - that customizations
1. Create for you system like BookLibrary
2. we can create for you Joomla site - where we leave only central part from ordasoft.com/BookLibrary.html
- so you will can build in it to yours current site as frame. So you will have Joomla site - only as admin panel for book manager
3 we cpecial for yours site will create front page like ordasoft.com/BookLibrary.html
- and this page will do all requests for data to other yours site - what work under Joomla
But that all customizations. So need yours request to "Contact form"