I am trying to figure out how to search for a book by ISBN using the Google Books API. I need to write a program that searches for an ISBN then prints out the title, author,
Can't you try like this as said in the developers guide developer guide if I did understand your task. You can do like this :
BooksService booksService = new BooksService("myCompany-myApp-1");
myService.setUserCredentials("user@domain.com", "secretPassword");
String isbn = "9780552152679";
URL url = new URL("http://www.google.com/books/feeds/volumes/?q=ISBN%3C" + isbn + "%3E");
VolumeQuery volumeQuery = new VolumeQuery(url);
VolumeFeed volumeFeed = booksService.query(volumeQuery, VolumeFeed.class);
// using an ISBN in query gives only one entry in VolumeFeed
List volumeEntries = volumeFeed.getEntries();
VolumeEntry entry = volumeEntries.get(0);
Now using the VolumeEntry api look for your desired getXXXX() and use it in your code.I hope it will help you to solve your problem.