Lauren Willig is an American writer, specializing in historical novels. She is best known for her "Pink Carnation" series, which follows a collection of Napoleonic-Era British spies, similar to the Scarlet Pimpernel, as they fight for Britain and fall in love.
Excerpt from Wikipedia, available under CC BY-SA 4.0.

The Betrayal of the Blood Lily
2010
ISBN 9781101163221
Ashford Park
2014
ISBN 9782258103627
The Mischief of the Mistletoe
2010
ISBN 9781101444702
The Garden Intrigue
2012
ISBN 9781101560334
The Ashford affair
2013
ISBN 9781250027191
The glass ocean
2018
ISBN 9780062642462
All the ways we said goodbye
2020
ISBN 9780062931115
Band of sisters
2021
ISBN 9780062986177
The secret history of the Pink Carnation
2006
ISBN 9780451217424
The English Wife
2018
ISBN 9781466860216
The Deception of the Emerald Ring
2007
ISBN 9781101211212
The Seduction of the Crimson Rose
2008
ISBN 9781101211908
The Temptation of the Night Jasmine
2011
ISBN 9780749040253
That Summer
2014
ISBN 9781466851474
The Lure of the Moonflower
2015
ISBN 9780698183476
The Record Set Right
2016
ISBN 9780062476470
Two wars and a wedding
2023
ISBN 9780062986207
The Masque of the Black Tulip
2010
ISBN 9780749010010
The Girl from Greenwich Street
2025
ISBN 9780063306134
The forgotten room
2016
ISBN 9780451474629
Das saphirblaue Zimmer Roman
2017
ISBN 9783734104275