Spirited debutante Lady Olivia McLeod, cherished daughter of the Duke and Duchess of Strathaven, has two interests: solving mysteries and winning the love of her rescuer and secret crush, the infamous Duke of Hadleigh. When Livy joins Lady Charlotte Fayne's charity for young ladies and discovers that it is a front for a covert investigative agency, she is thrilled. Livy dedicates herself to solving a deadly case. Little does she realize that the path to danger will also lead to her heart's deepest desire.

Rich, handsome, and fashionably jaded, Jason, Lord Radford, knows he must marry to get an heir, but assumes that any well bred young lady will do, so he offers for Caroline Hanscombe, whose name he draws at random. Caroline is pressured by her family to accept, but shy and musical, she finds her new fiancé alarming. Will this be a match made in heaven or hell? Or might Caroline quietly find herself a man who suits her better?

He's a policeman on a hunt for justice. She's a proud daughter of the London criminal underworld. Danger brings them together...and desire binds them in this steamy enemies to lovers romance. Shattered by betrayal, former scholar Harry Kent has made a new life for himself as a policeman. Sent on a dangerous covert mission, he must protect a clever and wicked beauty who specializes in disguises and mischief. She stands for everything he scorns - and seduces him with every look of her innocent eyes.

The new Duke of Torringford must take a wife in three weeks or lose the country estate he's unexpectedly inherited. His brother suggests an advertisement in the papers, but the Duke refuses to consider it - until a wine-fueled evening when he pens one in jest. Now with the ad printed, the Duke is mortified - but that's when the lovely Miss Penelope Hastings enters his life.

Lucy Bell burns with determination. Convinced an arrogant aristocrat is to blame for her expulsion from her beloved school, the penniless girl sets out to visit her best friend to help her undo the catastrophe. But when a storm on the road leaves her in a compromising position with a handsome gardener, she is swept away by his gruff kindness.