Mark Greaney
On-Sale Dates is a record of book on-sale dates, each checked against publisher and retailer sources and re-checked nightly.
Next book from Mark Greaney
Next: Dark Union, goes on sale 16 Feb 2027, in 116 days. Status: Pending.
Different places start the on-sale day at different moments. What the stores state about the day is further down this panel, under its heading.
One source, Apple Books (US), gives 16 Feb 2027. A second source is needed before this is listed.
What the on-sale day means
Not one of Apple Books and Kobo names an hour or a time zone for a digital pre-order. What each store says happens on the on-sale day is in its own sentence below.
An on-sale date is the first day a store is allowed to sell the book. That rule is written down at Penguin Random House, Penguin Random House UK and Hachette UK Distribution.
Every quoted sentence in full, with its link
- Apple Books
When your pre-ordered item becomes available, your payment method is billed and you receive an email.
- Kobo
You’re billed for the book on the day it’s released, not the day you pre-order.
- Penguin Random House
The date that a title is allowed to go “on-sale” and appear on shelves and on display in stores for customers to purchase
- Penguin Random House UK
These titles are supplied to retailers in advance to enable stock to be available for sale on publication day, but must not be sold or otherwise supplied to consumers before the Controlled Publication Date.
- Hachette UK Distribution
The Customer shall not sell or make available to the general public or any third party any Goods before the publication date of such Goods unless authorised specifically in writing by Hachette UK Distribution.
Reader questions and answers
Is Dark Union out yet?
Dark Union is not out yet. It goes on sale on 16 Feb 2027, and the date stands at Pending. Apple Books (US) is the first source on file to state that day.
What day does Dark Union go on sale?
Dark Union goes on sale on Tuesday 16 Feb 2027, and the date stands at Pending. One source on file states that same day. The date has stood unchanged since 9 Sep 2026.
Does Dark Union have an audiobook?
No audiobook of Dark Union is listed anywhere the site checks, and the alert fires on the day one is.
When does the paperback of Dark Union come out?
No paperback of Dark Union is listed anywhere the site checks, and the alert fires on the day one is.
Is Dark Union out in the UK?
The UK Ebook of Dark Union is dated 23 Feb 2027, and the date stands at Pending. Apple Books (UK) is the first source on file to state that day.
Books and editions
| Books and editions | Tier | Region | On-sale date |
|---|---|---|---|
| Dark Union | |||
| Hardcover A format expected for a book of this kind, not listed. | No date | US | Date not held yet Get an alert |
| Hardcover A format expected for a book of this kind, not listed. | No date | UK | Date not held yet Get an alert |
| Paperback A format expected for a book of this kind, not listed. | No date | US | Date not held yet Get an alert |
| Paperback A format expected for a book of this kind, not listed. | No date | UK | Date not held yet Get an alert |
| Ebook | Pending | US | Unverified: 16 Feb 2027 |
| Ebook | Pending | UK | Unverified: 23 Feb 2027 |
| Audiobook A format expected for a book of this kind, not listed. | No date | US | Date not held yet Get an alert |
| Audiobook A format expected for a book of this kind, not listed. | No date | UK | Date not held yet Get an alert |
| No date Not yet listed: Hardcover US, Hardcover UK, Paperback US, Paperback UK, Audiobook US, Audiobook UK Get an alert | |||
Release rhythm
Roughly every 12 months, from the 14 books since 2010, the longest gap is 26 months.
- The Gray ManFirst on record Released in 2009
- On Target Released on 28 Sep 2010
- Ballistic13 months after On Target Released on 4 Oct 2011
- Dead Eye26 months after Ballistic Released on 3 Dec 2013
- Back Blast26 months after Dead Eye Released on 16 Feb 2016
- Gunmetal Gray12 months after Back Blast Released on 14 Feb 2017
- Agent in Place12 months after Gunmetal Gray Released on 20 Feb 2018
- Mission Critical12 months after Agent in Place Released on 19 Feb 2019
- One Minute Out12 months after Mission Critical Released on 18 Feb 2020
- Relentless12 months after One Minute Out Released on 16 Feb 2021
- Sierra Six12 months after Relentless Released on 15 Feb 2022
- Burner12 months after Sierra Six Released on 21 Feb 2023
- The Chaos Agent12 months after Burner Released on 20 Feb 2024
- Midnight Black12 months after The Chaos Agent Released on 18 Feb 2025
- The Hard Line12 months after Midnight Black Released on 17 Feb 2026
Change log
- Dark Union: On 9 Sep 2026, No date became 16 Feb 2027. Title accepted from discovery: Apple Books (US) listing.
- Dark Union: On 10 Sep 2026, No date became 23 Feb 2027. Edition first seen: Apple Books (UK).
- Dark Union: On 11 Sep 2026, Pending became Listed. Nightly check: Apple Books (UK), Google Books.
- Dark Union: On 14 Sep 2026, Listed became Pending. The Google Books record counted here is the record another country's edition stands on, so it is not a second source for this one.
- Dark Union: On 15 Sep 2026, the edition was checked again and nothing changed. Nightly check: Apple Books (UK), Google Books; The Google Books record counted here is the record another country's edition stands on, so it is not a second source for this one.