My latest article is live on Coding4Fun. I wrote an API to interact with public libraries running Horizon Information Portal by SirsiDynix. It takes advantage of the XML that they expose to search for books, retrieve patron name/address (given user ID and password), checked out books, holds, and blocks. The library is packaged in a DLL along with a simple test client. This is part one with a second part to build a more functional UI with the same DLL. Check it out! Link to Check out this Code