Unmasking Miss Appleby — Emily Larkin

On her 25th birthday, Charlotte Appleby receives a most unusual gift from the Faerie godmother she never knew she had: the ability to change shape. Penniless and orphaned, she sets off for London to make her fortune as a man. But a position as secretary to Lord Cosgrove proves unexpectedly challenging. Someone is trying to destroy Cosgrove and his life is increasingly in jeopardy. As Charlotte plunges into London's backstreets and brothels at Cosgrove's side, hunting his persecutor, she finds herself fighting for her life -- and falling in love…