Return to Springwell is a continuation of the book Marked for Termination. Flashbacks are contained so the reader need not purchase the first book in order to get the flow of the story being told in this book. Casey Caldwell is a retired American Navy Admiral and is living part time in Bermuda. His uncle owns an estate in Southern England and is a retired general from the UK army. The two of them team up to solve a mystery coming out of Iran and Russia.