His Reluctant Duchess (The Scandalous Stringhams)

Mantheria, the Duchess of Glastonbury, is recently widowed and has no interest in marrying again.

But when her son, Andrew, runs away on an adventure, she turns to her dear friend Sunny, the Duke of Sunderland, for help.

Together, they follow the clues to find not only her son but the broken pieces of their hearts.