The use of "unicorn" in the name is completely appropriate. This place is unique, rare, and magical. The staff is both engaging and knowledgeable. If you're into really old books, inquire about the other side. They even have a selection of rare books, but be prepared to dig into your piggy bank for those.
I love that they offer store credit for used books. Note, they are selective about what they will keep but you can donate the ones they aren't willing to buy. This place is a must for any book lover!