The Blydon Family Saga Series
- Splendid
- Dancing At Midnight
- Minx
- "A Tale of Two Sisters" in Where's My Hero? (anthology with Lisa Kleypas and Kinley MacGregor)
The Lyndon Family Saga Series
- Everything And The Moon
- Brighter Than The Sun
Agents for the Crown Series
- To Catch An Heiress
- How To Marry A Marquis
Bridgerton Family
- The Duke and I - Daphne Bridgerton and Simon Basset
- The Viscount Who Loved Me - Anthony Bridgerton and Kate Sheffield
- An Offer From A Gentleman - Benedict Bridgerton and Sophia Beckett
- Romancing Mister Bridgerton - Colin Bridgerton and Penelope Featherington
- To Sir Phillip, With Love - Eloise Bridgerton and Phillip Crane
- When He Was Wicked - Francesca Bridgerton and Michael Stirling
- It's In His Kiss - Hyancinth Bridgerton and Gareth St.Clair
- On the Way to the Wedding - Gregory Bridgerton and Lucy Abernathy
The Bridgerton family consists of eight siblings and their widowed mother. In the novels, the Bridgertons are well respected and favored among British society. The Bridgertons are an extremely loving and tight-knit clan. The series comprises eight books in which each of the siblings finds true love. Each book is set against the backdrop of upper English society during the period of Regency England.
On the Way to the Wedding, won the Romance Writers of America RITA Award in 2007. In 2002,
To Sir Phillip, With Love was named one of the six best mass market original novels of the year by Publishers Weekly. Several books on the series have been on the New York Times bestseller list.
Quinn has published six "second epilogues" for
The Viscount Who Loved Me,
It's In His Kiss,
Romancing Mister Bridgerton,
When He Was Wicked,
An Offer From A Gentleman and
To Sir Phillip, With Love. The second epilogues are currently only available as e-books.
The Two Dukes of Wyndham
- The Lost Duke of Wyndham
- Mr. Cavendish, I Presume
According to Quinn, this two-book set was based on the premise “two men say they’re the Duke of Something. One of them must be wrong.” Events are concurrent and the plots are intertwined, with some scenes appearing in both books but from different perspectives.
The Bevelstokes
- The Secret Diaries of Miss Miranda Cheever (Nigel "Turner" Bevelstoke and Miranda Cheever)
- What Happens in London (Harry Valentine and Olivia Bevelstoke)
- Ten Things I Love About You (Sebastian Grey and Annabel Winslow) (released 25 May 2010)
Lady Whistledown
The witty gossip columnist "Lady Whistledown" from the Bridgerton series ties together these two anthologies of interlinked novellas:
- "Thirty-Six Valentines" in The Further Observations of Lady Whistledown (anthology with Suzanne Enoch, Karen Hawkins and Mia Ryan)
- "The First Kiss" in Lady Whistledown Strikes Back (anthology with Suzanne Enoch, Karen Hawkins and Mia Ryan)
Other
- "Gretna Greene" in Scottish Brides (anthology with Christina Dodd, Stephanie Laurens and Karen Ranney)