Hello, and congrats on your new store! I would suggest quickbooks POS for your situation. It will handle all of your needs. You will need to scan in your initial inventory (i know, its a pain) but it should do.
Another suggestion is to find someone that is selling a used Quicksell 2000 license. They got bought out my microsoft so they arent around anymore, but I set up a couple of book stores with it and the owners loved it!
Lastly, I heard through the grapevine that Provaya is doing a rewrite, their software is a great fit for bookstores. If you aren't buying for a few months, I would wait for their next release and go with them.