Have been to Birt's a few times now and am a fan! The food is delicious and the atmosphere is unique. The restaurant is IN the bookstore. Like literally--you are surrounded by books. That has it's pluses and minuses. The pluses is that it makes for interesting conversation pieces. The minus is that the customers will literally reach over you to pull a book off the shelf. (TACKY but true story).
There is an upstairs section to the restaurant which is a nice touch, but it makes serving difficult. Servers aren't as eager to take care of the upstairs customers and continually go up and down the stairs. If you want to be left alone, that's the place to sit...but if you need anything, you might find yourself going downstairs on your own to get drink refills.
Overall, this is a cute little spot that is quite unique. I will be back!