OK...I've gotten some feedback about troubles adding books.
We're aware of the problem and we're working very hard to fix it asap.

For now, here's the deal:

When you try to shelve a book and get bum results, go to Amazon.com and double-check the title name. If you enter the title exactly as you see it at Amazon, you'll get your book nearly every time. Be sure to include and subtitle too; in the case below if you just enter Secrets of the Kingdom you might not find your book, but if you enter Secrets of the Kingdom: The Inside Story of the Saudi-U.S. Connection you will.

We are working to make this process more flexible, but for now it often needs the exact title. All apologies. Thank you for your feedback and patience.