Book price comparison API integration

We require the same functionality for our newly designed website at par with our competitor's website(s) [login to view URL] or [login to view URL] Basic features we are looking for are as follows: User search a book Get the book list Check Price comparison It will list around 20-25 book sellers list with the price of that book in all those stores A button to send user to those stores with that perticular book URL Kindly let us know your cost & time to be taken by you. Plz reply URGENT!