Well written (of course! it's CL!) with nicely rounded main & secondary characters, although I thought the teenagers' dialogue was a bit too mature to be realalistic. The back & forth in timelines keeps the tension high but it begins to wear thin near the end & we're still not resolved. Not the best from these authors -- my favourite is "Josh & Hazel's Guide to Not-Dating" or "Sweet Filthy Boy" -- but a good read.