Sequencebooks
AuthorsSeries

Sequencebooks is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.

© 2026 Sequencebooks
Privacy PolicyAuthorsSeries

As an Amazon Associate, I earn from qualifying purchases.

Home/Authors/Diana Cosby

Diana Cosby

American author Diana Cosby is best known for her Scottish historical romance series, including the *MacGruder Brothers* and *Oath of Honor* novels. A former Navy meteorologist, her books have sold over one million copies and earned multiple award nominations. This page provides the Diana Cosby books in order, including both chronological and series reading order.

All books · chronological

2007His CaptivePOoMBB · 1Buy ↗
2008His WomanPOoMBB · 2Buy ↗
2010His ConquestPOoMBB · 3Buy ↗
2011His DestinyPOoMBB · 4Buy ↗
2013His SeductionPOoMBB · 5Buy ↗
2013His EnchantmentPOoMBB · 6Buy ↗
2014An Oath TakenPOoOTB · 1Buy ↗
2015An Oath BrokenPOoOTB · 2Buy ↗
2015An Oath SwornPOoOTB · 3Buy ↗
2016Forbidden LegacyPOoFB · 1Buy ↗
2017Forbidden KnightPOoFB · 2Buy ↗
2018Forbidden VowPOoFB · 3Buy ↗
2019Forbidden AlliancePOoFB · 4Buy ↗
2020Forbidden RealmPOoFB · 5Buy ↗

Book series · browse all →

Publication Order of Forbidden Books5 books · 2016–2020
01Forbidden Legacy2016Buy ↗
02Forbidden Knight2017Buy ↗
03Forbidden Vow2018Buy ↗
04Forbidden Alliance2019Buy ↗
05Forbidden Realm2020Buy ↗
Publication Order of Oath Trilogy Books3 books · 2014–2015
01An Oath Taken2014Buy ↗
02An Oath Broken2015Buy ↗
03An Oath Sworn2015Buy ↗
Publication Order of MacGruder Brothers Books6 books · 2007–2013
01His Captive2007Buy ↗
02His Woman2008Buy ↗
03His Conquest2010Buy ↗
04His Destiny2011Buy ↗
05His Seduction2013Buy ↗
06His Enchantment2013Buy ↗

More authors

A.G. Howard→A.G. Riddle→A.J. Aalto→A.J. Rivers→