The Duke's Secret

Regency romance
First published in hardback and paperback as Lord Deverill's Secret. Heat level sweet.
When Cassandra Paxton finds a mysterious letter in her dead brother’s belongings, the Duke of Deverill is the only one who can help. The Duke is Brighton’s most eligible bachelor but he is also a troubled man. Moving from her country estate to the delights of Brighton, Cassandra must discover his secret and decide how far she is willing to go for love.