I love this place. And the coffee shop (Latte Da) is my favorite coffee shop in the area as well. Some of the baristas could use a little training though...
The library is so quaint and has several different rooms that will definitely allow you to get some peace and quiet!
I have seen some SUPER WEIRD people lurking around here though, inside and out, so beware! It seems like a safe place though, generally.
Also, you do have to pay for parking there Mon-Fri 8-4, but 25 cents will get you an entire hour.