I would like to ask if there is any good program for ubuntu 12.04 to organize a library of books.I want to mention that I also have books written in my native language (Greek) and I have books written in other languages like English,French, etc too .So basically I need an application which can fetch information from databases for Greek books.

For example - Adding a Greek (ISBN) book database source and when I type the ISBN of the book in the program ,it should find the book from that databases.

Is this possible? I already tried Tellico and GCstar but they were unable to find books with Greek ISBN .I tried to add a Greek book source but it wasn't successful.