I don't think I've ever read a Ruth Ware book that I didn't like, and this one was no exception. I read it in a few hours because I couldn't put it down. It was exciting and interesting, and the pace was very good. I liked the characters, though I don't think I got to know any of them very well (which didn't matter too much for the story, I knew them enough to care). I also thought the tech element of this book was really cool, and different than most of the books that I've read. Thank you to NetGalley and Gallery Books for this ARC.

I was immediately sucked in to the book. Right from the get-go, Ware starts with a twist and things aren't what you might assume. The main character shows us a lot of cool "tricks of the trade" and is smart and determined. Ware writes an action-packed thriller just as skillfully as she does mystery. I'd recommend Harlan Coben fans pick this one up!

Thanks to NetGalley for providing me with a free ARC in exchange for an honest review.

Ruth Ware has created another heart-stopping story that makes you want to stay up all night reading. I appreciate the unique backstory of the characters. The author is able to make every book fresh and new. Would recommend to mature teens and adults.

One of the author's best books. Full of tension as Jack trys to solve the reason for her husband's death. It does become quite technical when explaining about security links on the dark web. It was also an interesting tour of England, moving from London to the countryside and back.. Obviously a great deal of research went into this book. The pace never slowed down, so it kept me up late into the evening.

You know that feeling you get when you begin a book and you just know it’s going to be amazing? This is that book. This is a Ruth Ware as I’ve never seen her before, a Ware, 5.0 version if you will, launching this masterful author onto another level of greatness. Jack’s story starts with a bang and the nonstop action, surprises and revelations keep going through to the bitter end. I was intrigued, educated and invested with each and every chapter, and ended up yelling at Jack more than once as some of the situations she found herself in were heart stopping. Zero Days is Ware at her best, and her others are hard to top!

This was another Ruth Ware classic. She is a fantastic author who can write atmospheric books. BUT it is completely different from her usual fare - it's not a closed room mystery, it's not about emotional relationships, etc. This is a heist-y, Mission Impossible kind of book. I hope this was something new Ruth was trying out and decides to go back to her original writing. Still, I'd read any Ruth Ware book.

This feels like a huge outlier for Ruth Ware. It's not what I expected, and I didn't like what changed. All Jack did was run from the authorities, and a lot of the plot was very samey. I come to Ruth Ware for atmospheric mystery, and this isn't it.

What a page-turning, breathless, romp Zero Days is! Although I figured out fairly early who the villain was, I just kept reading and reading and reading until I could breathe again!

Jacintha, or Jack as she is known, certainly has the most unusual career I have ever read about. She is the partner, with her husband, Gabe, in a company that tests security systems. She does the dirty work in the middle of the night penetrating on site a company’s cybersecurity, while Gabe manages the computer work at his desk. After one very hazardous night where she is picked up by the police, she returns home to find Gabe dead with his throat slit.

Jack is absolutely grief stricken, but when she realizes that the police consider her the prime suspect, she uses her best skillset to escape from the police station. Injured and full of grief, with a phone that keeps alerting people to her whereabouts, Jack sets out to pursue her leads and to try to piece together her husband’s murder. The only person she trusts is her sister, Helena, but even Hel’s phone and house may be compromised by the police.

For eight days, Jack is on the run, and the reader is running right along with her. The Booklist reviewer calls her a “very original and very real protagonist.” I was fascinated by everything Jack knew how to do to get into and out of all the places she was exploring. She was seriously injured climbing out of one building, but she continues to persist. Using several burner phones and a variety of tools she continued to solve every problem that came her way. “Solve the next problem. And then the next one after that. Keep putting one foot in front of the other. Until you can’t walk any further.” And just when the reader thinks that she will finally be captured, she escapes yet again.

When I finally had some time to reflect on my feelings about the book, I had to be impressed in two ways. I loved the protagonist that Ware created. Although she is headstrong, she has an amazing will to succeed and persist. And frankly, she is incredibly smart. And so is the author Ruth Ware. I can only imagine how much research Ware had to put into the cyber-verse and cyber crime to be able to put this novel together.

Oh my gosh, I was looking up reviews of the book, and I discovered that Zero Days has a definition beyond the number of days Jack had to solve the crime that killed Gabe. According to the Kaspersky website, zero-day is a broad term that describes recently discovered security vulnerabilities that hackers can use to attack systems. The developer just has “zero days” to fix the system. Whoo! That gives the book’s title a much deeper meaning, and gives me even more to admire Ruth Ware for!
Don’t get too worried about not understanding the terminology in the book. The plot moves so quickly and Jack is so amazing, the reader is able to navigate the cyber terminology and run right along with Jack.

Loved this book!

Thank you netgalley and the publisher for an advanced copy in exchange for my honest review.
This book was exactly what I look for in a thriller...fast-paced, keeping me guessing, with a bad-ass lead female!

ZERO DAYS is a wonderfully conceived high-octane thriller keeping the reader wanting more as they delve further into a murder investigation. Ware has written a novel with action, duplicity, and grit without sacrificing the heart our leading lady brings to the page.

This fast-paced story throws you in the thick of it from the beginning. Jack is a formidable character but is tested emotionally and physically throughout. It is this humanity that levels out and balances all the carefully crafted maneuvers she has to take to find a killer.

In many ways, the author did what she does best. She constructed a physiological thriller that pulls her reader into an all-consuming world tantalizing them with well-placed reveals. However, with this book, she wove in a more dynamic espionage element which perfectly blended with her style. This is not a hardcore spy novel. It is a thriller with twists, turns, and impossible decisions. And if there is a bit of breaking and entering on the side for justice, then so be it.

I love this author. Unfortunately, I could not get into this book. Hopefully next time.

I would like to thank NetGalley, the publisher, and the author for giving me the opportunity to read this book in exchange for my honest review.

I would like to preface this review by saying that I adore Ruth Ware and have loved so many of her previous novels, however I am sad to say that Zero Days was not one of my personal favorites. I know that the theme of this one was already something I was not as interested in, hackers are not my favorite plot line when looking at thrillers so I understand why I felt this way. I did not feel much of a connection with the main character and found myself very frustrated with her choices, which may have added to my lack of enjoyment. I also guessed the plot twist fairly early on, which I am not sure if it has to do with the book itself or just a trope I have grown accustomed to seeing in thrillers. With all this being said, I will highly anticipate Ruth Ware's next book and will continue to be a fan of hers, I hope others were able to enjoy this book!

Zero Days is suspenseful, mysterious, and a captivating read. Ware never lets me down and always keeps me guessing!

Ruth Ware, yet again, produces a book that I devoured! I read this in just a few days, mainly as I wanted to see what happened to Jack. Jack is the female half of a penetration testing duo that includes her husband, Gabe. They routinely check and break into companies to help them identify security risks. Until one job goes wrong and Jack comes home to find the murdered body of Gabe. What ensues is a wild ride as Jack tries to put all the pieces together and solve the crime before the police arrest her. Fast paced and chilling - a good read when you want to be immersed!

The story was predictable, but it was very well written. Perfect for a quick beach read. 3.75 stars.

What a ride! This book kept me engaged from the first page. Jack & Gabe have an unusual business that comes with some danger, but the danger turned out to be in their home. Jack’s devotion to her husband and determination to find out the truth for his murder felt honest & true to life. She is able to use her unusual skill set to conduct her own investigation while keeping hidden from the police but is she trusting the wrong people for help?

I finished this book within 24 hours - it is a must read for any thriller fans.

I always enjoy a Ruth Ware thriller and this one was no different. A woman whose job it is to break into businesses and find weaknesses in their security returns from a long night on the job to find her husband and business partner has been murdered—and naturally she's the top suspect. While I could see where it was heading quite early in the novel—partly because unlike many of her previous works there is just a few supporting characters—but I don't think it necessarily took away from my read. Still, those who are looking for something with a few more twists may be disappointed.

Ruth Ware is one of my favorite authors. I know when I start reading a Ruth Ware book I will accomplish little else until I am finished. Sadly this was not the case with Zero Days. I began it with anticipation but it waned fairly soon. I pressed on because after all it is Ruth Ware, but it a long read. I was disappointed but not discouraged. I shall read Ruth again and again.

Jacinda Cross' husband Gabe was murdered and she was being framed for it. Both Jack and her husband were professional hackers and had dangerous jobs. The main story was about Jack running from the police to try to find her husband's killer.

I was disappointed in this book and found it boring and uninteresting.

I always love a good mystery/thriller from Ruth Ware, and this one is no different. Ware knows how to create characters and flesh them out so they feel real. She gives them real emotions and takes us on a roller-coaster ride. Great book for mystery lovers.