Zero Days by Ruth Ware

A quick, tense hacking thriller with a familiar premise and a guessable killer.

The short version

Buy it if
  • Thriller readers who like a ticking clock structure
  • Readers curious about hacking and physical security as a story backdrop
  • Ruth Ware fans who want a faster, more action led book from her
Skip it if
  • You want a twist you will not see coming
  • You are tired of wrongly accused, on the run plots
  • You prefer Ware's slower, atmospheric locked room style

What owners like

  • Fast pace and a strong opening that keeps pages turning
  • Jack is a capable lead who balances grief with getting things done
  • Security and hacking details feel researched and grounded
  • Trade reviewers and fellow thriller authors praised the tension

Common complaints

  • The killer's identity is fairly easy to guess
  • The wrongly accused, on the run premise feels familiar
  • Jack pushes through injury and illness in ways some found hard to believe
  • Some technical explanation slows the middle, and supporting characters are thin
  • The ending leaves some threads open for some readers and wraps up too neatly for others

Based on The author's book page with trade praise, the Goodreads listing, and reviews on Debbish, Carpe Librum and The Bookish Elf.

Research scores

Does the job 7.5 fast, tense thriller, though the killer is easy to guess
Quality 7.0 grounded security detail, but a familiar premise and thin side characters
Ease of use 8.0 countdown chapters make it a quick, easy read
Value 7.5 a full length standalone available in hardcover, ebook and audio

Scored from the maker's specs and what owners report. Drew's own notes and photos will refine these.

Ownership

Times bought1
Price range$$

Drew's hands-on notes for this product are on the way. Long-term updates will be added to this timeline.

What it does

A 2023 standalone thriller about a penetration tester who finds her husband murdered, becomes the prime suspect, and goes on the run to find the killer.

  • Lead character Jack is a penetration specialist who breaks into buildings and hacks systems to test security
  • Chapters count down the days, which drives the pace
  • Mixes a chase plot with a story about grief after her husband Gabe's death
  • Technical details on lock picking and software exploits that reviewers found believable
  • A standalone, so no earlier Ware book is needed

A good pick for readers who want a fast, countdown structured thriller with a hacking and physical security angle. The trade off is that several reviewers found the killer easy to guess and the wrongly accused setup familiar, and at least one longtime Ware reader ranked it below The Turn of the Key.

How it compares

The Turn of the Key by Ruth WareBetter if you want the earlier Ware nanny story that at least one reviewer of Zero Days rated higher$
One Perfect Couple by Ruth WareBetter if you want a newer Ware thriller with a reality TV island setup$$
The Woman in Suite 11 by Ruth WareBetter if you liked The Woman in Cabin 10 and want its follow up$$

Specs

Author
Ruth Ware
Publisher
Gallery/Scout Press (Simon & Schuster)
US publication date
June 20, 2023
Format
Hardcover (this ISBN); also ebook and audiobook
Length
356 pages
ISBN
9781982155292
Genre
Standalone mystery thriller

Questions

What is Zero Days by Ruth Ware about?

Jack and her husband Gabe are hired to break into buildings and hack security systems. After a job goes wrong she comes home to find Gabe dead, becomes the prime suspect, and has to run while she hunts for the real killer.

Is Zero Days a standalone?

Yes. It is not part of a series.

When did Zero Days come out?

June 20, 2023 in the US and Canada, and July 2023 in Australia and the UK.

How long is Zero Days?

The hardcover runs 356 pages.

Is Zero Days as good as The Turn of the Key?

Reviewers mostly enjoyed it, but one Ware fan ranked it below The Turn of the Key, and others noted a guessable killer and a familiar premise.

Sources

Researched 2026-10-02. We bought this product; our page is built from the maker's details and what owners report across reviews and forums. We never copy Amazon customer reviews.

7.5Zero Days by Ruth Ware Check price