Jack and her husband Gabe are security experts, hired to break into buildings and hack security systems. When a routine assignment goes awry, Jack returns to find her husband dead. Now Jack is the prime suspect and, on the run, she must decide who she can trust while hunting the real killer.

In Zero Days, Ruth Ware forgoes her trademark gothic psychological thriller for a straight-up action thriller that sorely missed the mark. With just a few chapters, the reader finds Jack on the run for murder, never stopping until the end of the book. Instead of setting a thrilling pace, the plot felt repetitive, with bursts of movement interspersed with Jack's thoughts as she grieves. With very few characters, it wasn't difficult to figure out whodunit which always spools the fun of any mystery. Having read all of her books, Zero Days is my least favorite Ruth Ware book.