JJON2 - Zero Days. Soft cover novel (sorry, no shipping)

Very good condition

Premise: 

Jacintha “Jack” Cross Jack and her husband, Gabe, are the best security breach specialists in the business. Hired by companies to test the strengths and weaknesses of their systems, Jack handles the physical break-ins while Gabe tackles the digital aspects. They make an excellent team outside of work too. But after a routine assignment goes horribly wrong, Jack arrives home to find her husband dead. To add to her horror, the police are closing in on their suspect—her.