I typically send free samples to my Kindle from Amazon to help me select my votes. I create "empty book" records in calibre for the ones that sound most interesting under a collection called "MobileRead Nominations". That way in the process I also am creating a good TBR list from our club that's easy to find later!
I download the metadata which provides a summary of the books. Then I use the Overdrive plug-in. It tells me whether the book is at one of my libraries or available for purchase on Amazon. It also tells me if there are audiobook options.