The Earl’s Error by Rose Pearson

A wrongful accusation. A reluctant partnership. A romance neither expected.

Miss Joceline Trentworth knows precisely what she wants: a good book and a quiet place to read it! Unfortunately, her mother has other ideas and she is thrust headfirst into society, grateful for her fellow bluestockings who quickly rally around her.
When Lord Albury’s stolen necklace is unexpectedly found in her very own bedchamber, however, Joceline is quickly embroiled in a confounding mystery – and held in Lord Albury’s sights!
Theodore is sure Miss Trentworth was the one who stole his necklace and is determined to prove it! Drawing close to her in hopes of catching her out, he begins to realize that he might be the one confounded in the end!