"This city of ours-- it has taken me too long to realize it, but we are in the Venice of this world. The Venice." 
 As a new-ish San Francisco resident, I read this at exactly the right time. It captures the nerdy, quirky, and insular excitement of this city exactly. I loved the characters (except Kat, ugh) and the story was so. much. fun. I really enjoyed it, but the ending felt a little bit too much like a perfectly wrapped package for me (even though it was certainly appropriate given the rest of the story's lack of believability). Almost 5 stars but not quite-- I still highly recommend it if you like any/all of the following: nerd culture, books, San Francisco, quests, technology, typography, the idea of immortality. Yep. 
 "and then: the right book exactly, at exactly the right time."