Bookaml is a library providing a basic API for validating ISBNs, gathering information about a book given its ISBN, or to find any number of books matching given search criteria. It is closely tied to the Amazon Product Advertising API, which it uses internally for retrieving book information.
Note that if you intend to use the library's facilities beyond basic validation of ISBN numbers, you will need an Amazon Web Services account and associated access keys.
Bookaml uses OASIS. Building and installing follows the costumary configure, make, and make install sequence. To generate the ocamldoc API documentation, run make doc.
You can browse the Ocamldoc generated API documentation online.