Ridiculously good. In the past, I've admired James's wit and quirk, however sometimes her characters tend to talk too much. Not once did I encounter that issue in WBTTB. The chemistry between the hero and heroine is amazing, the dialogue is genius, there was sufficient action to balance the dialogue and the love story is quite believable despite the extraordinary circumstances. This is definitely a new favorite of mine and I'm eager to read her next one.