"Lilah and Suzanna" by Nora Roberts contains the third and fourth books in the Calhoun series.
In "For the Love of Lilah," Lilah Calhoun drives down to the beach on a stormy night and sees a man struggling in the waves. Lilah saves his life and brings him home with her. It turns out that Max Quartermain was working for the thief Livingston and sorting through the papers he stole from the Calhouns in an attempt to discover the whereabouts of the Calhoun emeralds. When Max discovered who this man really was and why he had been hired, he made a daring escape off the boat and into the ocean. After several days of recuperation, Max begins working with the Calhouns in an attempt to recover the emerald necklace. Max finds the stunning Lilah quite a distraction. The steamy romance Max and Lilah share will keep readers turning pages. Readers will love our hero Max, the bookish professor with a heart of gold. Lilah, a wonderfully strong and determined heroine, will also win readers over. The mystery of the emeralds and the havoc that the evil Livingston causes add some fun and excitement to the romance and make for a truly enjoyable read.
"Suzanna's Surrender" is the best of the series. The heartbreaking story of Bianca, the original mistress of "The Towers," and her lover Christian has been told throughout the Calhoun series. In this fourth book, the Calhouns track down Christian's grandson, Holt Bradford, and ask for his help in finding the emeralds. When Suzanna goes to speak with Holt, he is rude and uncooperative at first. Holt has always thought of Suzanna as the beautiful princess in the tower who is way out of his league. However, the attraction is very strong from Suzanna's side as well and they end up acting on their powerful feelings. Suzanna has two young children to care for, and has had her faith in herself as a woman destroyed by her cruel ex-husband. Fortunately, Holt is just the man to help her out. Holt is a wonderful hero. His prickly exterior covers a generous and caring man. Holt's relationship with Suzanna's children will touch your heart.
With the help of Holt, the Calhouns come closer and closer to finding Bianca's emeralds. But the dangerous Livingston is close by, and will stop at nothing to possess them himself.
This book provides a satisfying end to the mystery of the emeralds. It also contains characters that you will really come to care about and a romance that will leave you feeling fulfilled.
One note of warning though - I suggest you read these books in order, "Catherine and Amanda" and then "Lilah and Suzanna," as the story of Bianca and the story of the emeralds builds from one book to the next. Overall, I highly recommend the Calhoun stories, they are great!