Tectonic

Not my favorite book in the series, although the story is well written and has likeable characters. Only the MCs fell a bit short for me.
(It's probably just me that I find “sassy”, “feisty”, “adorable” or “spunky” heroines like Greta mostly annoying and exhausting. And Shane is not my favorite hero in this series, either. Trying to impress a girl with his car? Really? Dude...)