Fourth in the Michael Moreland series after Michael's Secret, No Secrets, and Secrets Lie Still, Secrets Worth Keeping chronicles life at Highfield, an estate on Prince Edward Island beginning in the fall of 1940. After the arrival of Highfield's owner, Rear-Admiral Sir Richard Moncrieff, a chief intelligence officer with Britain's Secret Intelligence Service, Sir Richard's dream for Highfield becomes reality. Years earlier, he envisioned an outpost in Canada where the essential work of SIS could continue in the event that Nazi Luftwaffe attacks threatened SIS headquarters in London. After his arrival at Highfield, Sir Richard continues his work with SIS by radio, while re-connecting with his wife, Angela, his daughter, Susan, and his son-in-law, Michael Moreland, another SIS operative. As the war rages on in Europe, life for those at Highfield blossoms and finds deeper roots, but always in the shadow of a world-wide conflict that continues to grow. In the midst of war with enemies whose evil knows no bounds, those at Highfield learn there are some secrets worth keeping.