Thanks everyone for the comments!
Also, we think this is a good thing - tell us if it is not - but we only search for items that are Kindle related.
In other words, if you look for a book that is NOT available in the Kindle format, you will not get any search results back.
We do have another tracker for that, but that's a separate thing.
You guys are Kindle guys
So, we keep the results Kindle only to keep it clean and easy to use.
And, that way, you can keep tabs on your book that you have been waiting to be Kindle-itized. If the book is available, you will see it.
(Thanks everyone for the kind comments and suggestions so far!)