High-energy thriller revolving around a woman dealing with trauma-induced memory lapses and the cops pursuing her as the primary suspect in a murder investigation. 

But also what happened to Shauna and why does no one in this book care? For that matter, there are a number of questions left unanswered. 

All in all, an un-putdownable thrill-ride of a book that’s very slightly let down by a lacklustre ending.