The Duchess Diaries by Jillian Hunter

Miss Charlotte Boscastle, headmistress of Scarfield Academy for Young Ladies, is careful to guard her reputation — but when her personal diary goes missing, she fears her most intimate thoughts may become scandalous gossip. When the Duke of Wynfield finds the diary, his intention is simply to return it… until Charlotte’s indiscretions stir something unexpected between them. With passion lurking behind every page and propriety under threat, The Duchess Diaries delivers a sparkling tale of desire, deception, and unexpected love.