"Lady Sophia's Lover" is the first book I've read by Lisa Kleypas. I liked it so much that I intend to read her other novels as well. The author's writing style is great and it keeps you reading and reading until you finish. The story is set in early 19th century England mostly in London. The plot is very original and very interesting. The main characters are unusual and the approach to romance is original.The leading characters are Lady Sophia Sydney, daughter and orphan of an impoverished noble family.She works as a housekeeper in order to survive.She is very attractive and she seeks new employment at Sir Ross Cannon's Bow Street public office.The leading male character is Sir Ross, the Head of the famous Bow Street Runners and one of the most eligible widowers in London. He is a ruggedly handsome, hard-working and bitter man who has lived his life in celibacy after his wife's untimely death. He feels immediately attracted to Sophia and he cannot comprehend why does she want to work at his office. Sophia has her own serious reasons for seducing Sir Ross and to make him suffer publicly and privately. She thinks that her young brother died because of him and she wants to revenge him.She is a passionate woman and she cannot help to feel deep attraction and later love for Sir Ross. She fights her feelings but her love is stronger than her wish for vengeance. Sir Ross feels so attracted to Sophia that he cannot stay in a room with her without touching her. She is the first woman who makes him to forget his bitter mourning and to find happiness in her arms. The relationship of Ross and Sophia is very sensual, hot and full of passion. I was surperised by the tasteful love scenes and the passionate feelings which make the book exciting and hard to put down. Ms Kleypas has done a good research of the era and the Bow Street Runners. She describes her characters very well and makes them alive and approachable. The story is action-packed and you finish reading the book in record time. LADY SOPHIA'S LOVER is a fascinating story of love, passion, trust and understanding.It's interesting to follow how the main characters find the way to each other through their love. I've enjoyed this beautiful romance very much and I highly recommend it to all historical romance lovers.