A Debutante In Disguise by Eleanor Webster
A society lady
...with a secret!
Determined to help people, Letty Barton has a double life - she's a trained doctor! No-one must know 'Dr Hatfield' is actually a woman. Called to an emergency, she comes face to face with her patient's brother, Lord Anthony Ashcroft... They'd once shared a spark-filled flirtation - now he's a brooding, scarred war-hero. But how long will it be before he recognises her, beneath her disguise, and the sparks begin to fly once more...?