What's more exciting than an earthquake that shakes you out of bed first thing in the morning? Sarah Andrews' newest Em Hanson mystery - Fault Line - which kept me up until 2am this morning! Fault Line finds Em Hanson, out-of-work petroleum geologist and fledgling forensic geologist, living in Salt Lake City, sorting out her life. A 5.2 M earthquake on a branch of the Wasatch Fault wakes everybody up and the death of the head of the Utah Geological Survey really gets things rolling. Earthquakes aren't Em's specialty, so we join her as she learns more about the fault lines that run under Salt Lake City and through relationships and families. Cracks appear in the brand new stadium that is to be featured in the opening ceremonies of the Winter Olympics and in Em's relationship with her boyfriend Ray, Salt Lake City cop and devout Mormon. Shaky ground is found at the site of a brand new shopping mall and in the relationship of Faye, Em's best friend, and Tom Latimer, Zen FBI agent and Em's mentor in detecting. As always, Em the geologist teases out the big picture from a mess of details. Be prepared to learn a lot about seismology and engineering geology. Trips to the ski slopes in Alta, the [Flying] Pie Pizzeria, and the [beautiful] retrofitted City and County Building fill out the local color. In my opinion, this is the best Em Hanson mystery yet. On the Modified Mercalli Scale of Earthquake Intensity, XII means total destruction. On the open-ended [Gutenberg]-Richter Scale of Earthquake Magnitude, a 9.5 is the largest earthquake ever recorded. I can only give Fault Line by Sarah Andrews 5 stars, but if I could give it more, I would!