Something Extraordinary by Alexis Hall

From the author of Boyfriend Material comes the absurdist adventure of two friends determined to avoid marriage to unsuitable people as they race through Regency England to marry each other instead.

Sir Horley Comewithers isn’t particularly interested in getting married, especially when his match is a perfectly respectable young woman. Sir Horley is, after all, extravagantly gay. But he’s resigned to a fate there’s no point resisting—until a dear friend does it for him.
Arabella Tarleton has no interest in romance, but even she can see that Sir Horley’s nuptials are destined to end in a lifetime of misery. Well, not on her watch. And what are friends for, if not abducting you on the night before your wedding in an overdramatic attempt to save you from a terrible mistake?
Their journey to Gretna Green is a hodgepodge of colorful run-ins and near misses with questionable innkeepers, amateur highwaymen, overattentive writers, and scorned fiancées. Then again a bumpy road is better than an unhappy destination.
But when it comes to marriage, Belle and Sir Horley are about to discover that it’s not what you do or how you do it but the people who you choose to do it with that matter most.