Mills and Boon Superromance
Mills and Boon started it's SuperRomance imprint in November 2001 under the name Silhouette Superromance. The imprint reissued Harlequin Superromance titles with new covers and it's own series numbering, but kept the Harlequin-ISBN, which makes it difficult to distinguish between the editions. Amazon's UK branch often gives the right cover and publication date (Amazon UK and Amazon.com), but also the right date and the wrong cover (Amazon UK and Amazon.com).
Also Special Releases by Harlequin and Silhouette were included in the imprint.
When Mills & Boon renovated it's Silhouette imprints in March 2007, the imprint's name changed from Silhouette SuperRomance to Mills & Boon SuperRomance and to the ISBN Prefix of Mills & Boon.
The current SuperRomance imprint is the second of that name in the UK. In 1983 Mills & Boon released it's own imprint of Harlequin Superromance, which at that time were published by Worldwide, a division of Harlequin, as (Worldwide) Superromance in America. Because it was not a 1:1 adoption of the American edition but a selection, the line had its individual numbering.
Until January 1985 it was possible to distinguish the UK edition by its ISBN Prefix of Mills & Boon, but from that time until April 1986 the titles kept their originally Harlequin-ISBN. After that the UK edition was published by Worldwide until 1988, when it became part of the Mills & Boon Silhouette imprint. In August 1990 the separate UK line was discontinued and now the American edition was available in the UK without changing the covers or the numbering (Amazon UK Customer Image and Amazon.com Customer Image), which ceased probably in 1999.
The Baby Doctor by Bobby Hutchinson of 1997 had two UK releases: one probably in 1998 as Harlequin Superromance #753 (Shelfmark H.98/1507 in the British Library) and one in 2003 as Silhouette Superromance #80 (Shelfmark H.2005/2033 in the British Library.)
Note: The British Library used the the data of the first edition all over again. Look at Price - the edition of 1998(?) didn't have a price in British Pounds (£) on the back cover.
- Mills & Boon Superromance By The Numbers - a by-the-numbers list of titles
- Harlequin Superromance at Mills & Boon/Worldwide By The Numbers - a by-the-numbers list of titles from 1983 to 1990
SuperRomance Extra
In 2005 and 2006 occasionally titles - published in America in the Mira imprint- were released as Extra.
- Two Sisters and 24 Hours - Kay David, July 2005
- 16 Lighthouse Road - Debbie Macomber, September 2005
- 204 Rosewood Lane - Debbie Macomber, October 2005
- 44 Cranberry Point - Debbie Macomber, November 2005
- Taking The Heat - Brenda Novak, July 2006
Silhouette 2001 
Silhouette 2003 
Silhouette 2004 
Mills & Boon 2007 
Mills & Boon 2007
