Deborah Garland Books in Order (Updated March 12, 2026)

Deborah Garland writes contemporary romance, cowboy romance, romantic suspense, dark mafia romance, and an older paranormal series. Her catalog is not one single continuity. Instead, it breaks into several shelves, with a few clear bridges between them.

The biggest reading-order question is not “What was published first?” It is “Which worlds actually talk to each other?” For most readers, that means treating the lighter contemporary and cowboy books as separate lanes, then reading the Irish-mafia books in their own connected run.

The shelf map

There are three practical ways to approach Deborah Garland.

If you want the current flagship material: read the Irish-mafia line, starting with Rebel Billionaire as an optional setup, then moving into Astoria Royals, the Astoria Royals Standalones, and Quinlan Empire.

If you want contemporary romance first: start with Forever Mine, then decide whether to continue into Undeniably Yours and The Billionaire Hart, which share some crossover character traffic.

If you want a fully separate lane: read Wild Texas Hearts, Houston After Dark, or The Princeton Allegiant on their own. The cowboy books connect to each other, while the vampire books sit apart from the romance universe.

Best reading path for most readers

This is the strongest continuity-first route, not the oldest-publication route.

1. Rebel Billionaire (2020): This billionaire romance is the cleanest optional on-ramp into the Irish-mafia side because Sabine Quinlan and her family directly feed into the later Astoria books.
2. Sinful Vows (2023): A prequel-style origin story for Ewan Quinlan and the wider Astoria conflict, best read before the O’Rourke books if you want the full family context.
3. Savage King (2023): This properly starts the O’Rourke brothers’ main run and lays down the family politics that carry through the rest of Astoria.
4. Sleeping with the Enemy (2023): The second O’Rourke book deepens the same mafia feud, so it works best straight after Savage King.
5. Deal with the Devil (2023): This keeps the Brides and Sinners subplot moving and should stay in sequence for the payoff to land cleanly.
6. Ring of Truth (2024): This resolves the Brides and Sinners arc, so it is the right place to finish the first Astoria block.
7. Reckless Obsession (2024): The first Astoria standalone shifts to another O’Rourke brother and is best read after the main five-book setup.
8. Shattered Veil (2024): Another connected standalone that works better once the Astoria family structure is already familiar.
9. Illicit Temptation (2024): This is the bridge book that points most clearly toward Quinlan Empire, so it belongs here rather than later.
10. Brutal Collateral (2025): The Quinlan side takes over here, with Griffin’s book opening the next connected mafia shelf.
11. Savage Promises (2025): The second Quinlan Empire novel builds on the same family network and is stronger in order.
12. Lovely Venom (2025): Connor’s book continues the sequence and should stay in its published slot.
13. Holiday Scars (2025): This short MM holiday novella is optional, but it fits best after Lovely Venom because it lives inside the same Quinlan world.
14. Wicked Deception (2026): Rhys’s book is the current latest numbered Quinlan Empire novel and belongs last in the verified run.
15. Lessons in Corruption (2026, upcoming): This is the planned Cormac O’Rourke book and the next Astoria standalone, so it is best treated as the current endpoint once released.

Contemporary shelves

These books are better treated as their own romance lane. They share some character cameos and renamed editions, but they do not need the mafia books to work.

Forever Mine / Mallory Family

1. Wait for Me (2017): The series opener centers Gwen and Andrew and is the right first stop for the Mallory-family shelf, even though later reissue history makes the dates look messy in some catalogs.
2. All for Me (2018): Greg and Faith’s story builds the sibling line further and is best read second because the family tone is already established.
3. Live for Me (2020): Skye and Edward close the main sibling run, making this the natural third book.
4. His Christmas Surprise (2020): This Greg-and-Faith holiday novella works best after the main trilogy because it revisits the family rather than launching it.
5. Accidental (2020): Some catalogs fold this into Forever Mine, but the author’s current reading-order page places it with Undeniably Yours, so it is safer to treat it there instead of as required Forever Mine reading.

Undeniably Yours

1. Accidental (2020): Lily and Carter’s book opens this billionaire-standalone shelf and also gets referenced on the author’s reading-order page as part of the broader crossover web.
2. Unexpected (2021): Victoria and Theo’s story follows well from Accidental, especially because Theo is already part of the connected billionaire side.
3. Convenient (2021): Jolie and Mikhail’s marriage-of-convenience story is often the trickiest book to place because the author notes it technically happens before parts of The Billionaire Hart, but as a shelf it is still best read here unless you want the strict crossover timeline.

The Billionaire Hart

1. The Good Billionaire (2021): This prequel novella introduces Sebastian and the Hart family orbit, so it is the cleanest true starting point for this shelf.
2. Daring the Billionaire (2020): Tristan and Laney’s book starts the main trilogy and establishes the Hart-brothers line.
3. Bossy Billionaire (2020): Luke and Lexi’s story expands the same billionaire family world and introduces Theo Markham more clearly.
4. Rebel Billionaire (2020): Grayson and Sabine’s story matters beyond this shelf because it brings the Quinlans into view and functions as an early bridge to the mafia books.

Cowboy and suspense shelves

These books form a separate track. They are cleaner to read one shelf at a time than to weave into the billionaire or mafia books.

Wild Texas Hearts

1. The Cowboy’s Forbidden Crush (2021): A prequel-style starter that introduces the ranch world and several future leads, making it the best place to begin this lane.
2. The Cowboy’s Last Song (2021): Jamie and Harper’s story opens the main numbered sequence and keeps the series rooted in the same ranch orbit.
3. The Cowboy’s Accidental Wife (2021): Cameron and Lakelyn’s book builds directly on the Renner family setup.
4. The Cowboy’s Rebel Heart (2021): Logan and Delsey continue the same small-world cowboy network, so it is best kept in order.
5. The Cowboy’s Christmas Bride (2021): Parker and Grace’s holiday romance still belongs in sequence because it uses the established family circle.
6. The Cowboy’s Wedding Planner (2022): Sierra and Declan’s story closes the core run and also matters because it introduces characters who spin off into Houston After Dark.

Houston After Dark

1. Off Limits Lover (2022): This free prequel introduces Grant, Avery, and the security-company setup, but it is intentionally incomplete for that couple.
2. Rough Lover (2022): Grant and Avery get the real payoff here, so this is the actual first full novel of the series.
3. Hard Lover (2022): Noah and Callie Rose continue the same protection-world setting and should be read second among the full novels.
4. Untamed Lover (2022): Zane and Fina close the current trilogy, making this the right last stop.

The Irish-mafia shelves in publication order

This is the publication-first view for readers who want the mafia books grouped cleanly by shelf.

Astoria Royals: Brides and Sinners

1. Sinful Vows (2023): Ewan Quinlan’s prequel-style book introduces the family ties and the underlying series arc.
2. Savage King (2023): Kieran O’Rourke’s book opens the main O’Rourke brother sequence and should be read before the later brothers.
3. Sleeping with the Enemy (2023): Riordan’s book keeps the family conflict moving and depends on the same ongoing tension.
4. Deal with the Devil (2023): Lachlan’s book continues the Bratva-linked subplot and works best in order.
5. Ring of Truth (2024): Darragh’s book is the payoff novel for this first Astoria cycle, so it should stay last in the set.

Astoria Royals Standalones

1. Reckless Obsession (2024): Eoghan’s book begins the standalone block, but “standalone” here still means interconnected rather than disconnected.
2. Shattered Veil (2024): Balor’s story fits best after Reckless Obsession because it remains inside the same O’Rourke family ecosystem.
3. Illicit Temptation (2024): Shea and Trace’s story is the most important bridge to Quinlan Empire, making it the least skippable of the three if you plan to continue.
4. Lessons in Corruption (2026): Cormac’s long-awaited story was previously tentatively described as Rules of Redemption, but current catalog listings point to Lessons in Corruption as the active title.

Quinlan Empire

1. Brutal Collateral (2025): Griffin’s book starts the Quinlan-led branch and works as the true entry point for this shelf.
2. Savage Promises (2025): Shane’s story continues the brother-centered structure and is best read next.
3. Lovely Venom (2025): Connor’s book remains part of the same tightly linked Quinlan run, so it belongs third.
4. Holiday Scars (2025): This MM holiday novella is optional, but it is explicitly set in the Quinlan Empire world and slots naturally between books three and four.
5. Wicked Deception (2026): Rhys’s story is the current book four and the latest published mainline Quinlan Empire installment I could verify.

Separate continuity

The Princeton Allegiant

1. Drawing Bloodlines (2019): This vampire romance starts an older paranormal trilogy that does not belong to the billionaire, cowboy, or mafia shelves.
2. Guarding Bloodlines (2020): The second book continues that paranormal world and should be read after Drawing Bloodlines.
3. Matching Bloodlines (2020): This closes the trilogy and is best saved for last because it depends on the established allegiant setup.

What about strict chronology?

Deborah Garland is easier in publication order than in a strict internal timeline. The main exception is the crossover tangle around Convenient, The Good Billionaire, and Rebel Billionaire, where the author’s notes acknowledge that some books technically occur earlier than the current series labeling suggests.

For almost everyone, the better rule is simpler: read within each shelf in order, and only use the stricter crossover order if you want every cameo and setup to line up exactly. The one bridge that matters most is Rebel Billionaire before Astoria Royals, followed by Illicit Temptation before Quinlan Empire.

Latest release status

The newest verified mainline release I found is Wicked Deception (February 2026) in Quinlan Empire. The next clearly listed upcoming connected title is Lessons in Corruption (May 2026), which is Cormac O’Rourke’s Astoria Royals Standalone book. Fantastic Fiction also lists an American Mafia series beginning with Ruthlessly Obsessed (June 2026), but because that series does not yet appear on the official books or reading-order pages I checked, I would treat it as upcoming but separate from the current core recommendation.

Common questions

What is the best Deborah Garland book to read first?

For readers who want the books most associated with her current catalog, start with Rebel Billionaire if you want the smoothest bridge into the mafia books, or start with Sinful Vows if you want to enter the Irish-mafia world directly.

Do Deborah Garland books need to be read in order?

Within a series, yes is the safest answer. The author notes that many can work as standalones, but the connected-family shelves are clearly stronger in order, especially Astoria Royals, Astoria Royals Standalones, and Quinlan Empire.

Which series are fully separate?

The Princeton Allegiant is separate continuity. Wild Texas Hearts and Houston After Dark connect to each other, but not in a way that requires the billionaire or mafia books.

Is Holiday Scars required?

No. It is a world-specific novella inside Quinlan Empire, so it is best treated as optional rather than essential.

Final call

If you only want one clean path, read Rebel Billionaire, then move through Astoria Royals, Astoria Royals Standalones, and Quinlan Empire. If you want Deborah Garland outside the mafia books, pick one shelf and stay inside it: Forever Mine for contemporary family romance, Wild Texas Hearts for cowboys, Houston After Dark for romantic suspense, or The Princeton Allegiant for paranormal romance.