Julia Quinn The Lyndon Sisters and The Lady Most Likely Saga Series 4 Book Set

The Lady Most Likely
Hugh Dunne, the Earl of Briarly, needs a wife - so his sister hands him a list of the very best young ladies on the market. And then, because he refuses to tear himself away from the stables where he trains Arabian racehorses, she invites all those ladies to a house party, along with some other bachelors, of course.

The Lady Most Willing 
During their annual Christmas pilgrimage to Scotland to visit their aged uncle in his decrepit castle, the Comte de Rochefort and his cousin, Earl of Oakley, are presented with rather . . . unique gifts. Their Uncle is determined that his ancient (if not so honourable) birth right be secured before he dies and since neither nephew seemed in enough of a hurry to wed, the old reprobate has taken matters into his own hands . 

Everything and the Moon
When Robert Kemble stumbles across Victoria Lyndon in a hedgerow maze, he can't believe his eyes. The girl who'd torn him in two, who let him plan an elopement and then left him standing by the side of the road, was suddenly within arm's reach, and even though his fury still knew no bounds, she was impossible to resist.

Brighter then the Sun
When Charles Wycombe, the dashing and incorrigible Earl of Billington, toppled out of a tree and landed at Ellie's feet, neither suspected that such an inauspicious meeting would lead to marriage.