Island Sisters Mysteries Books in Order

The Island Sisters Mysteries begin with loss and a very bad surprise. Evie Mead is recently widowed when she learns that her late husband may have left her the rights to a worn-out Art Deco hotel on Tregarrick Rock, in the Isles of Scilly off Cornwall. Her sister Margot, who flies in from Los Angeles, sees possibility where Evie sees more complications. Together they head for the island and step straight into a mess of secrets, debt, and murder.

The sister dynamic is the backbone of these books. Evie is steadier, more private, and trying to rebuild a life she did not expect to lose. Margot is more glamorous, more impulsive, and often quicker to leap before looking. They bicker, protect each other, and balance each other out. That gives the series a warmer, more personal feel, even when the murders start piling up.

Tregarrick Rock is a great mystery setting because it can feel both open and trapped at the same time. The sea is gorgeous, the hotel has history, and the island comes with its own set of odd locals, long memories, and hard practical limits. Weather matters. Tides matter. Boats matter. When something goes wrong, people cannot simply hop in a car and leave. In Death at High Tide, that locked-island pressure is part of what makes the story work so well.

The island is gorgeous, but it never feels entirely safe.

The hotel matters just as much as the setting. It is not a polished getaway. It is a fixer-upper with money problems, staffing headaches, and a past that still reaches into the present. In Danger at the Cove, the sisters are trying to renovate and reopen when fresh guests, old rivalries, and new deaths threaten to sink the whole plan. That ongoing effort to save the hotel gives the series a steady through line, and it means the stakes are personal every time trouble arrives.

These books are cozy mysteries, but they lean a little more into suspense than the Honeychurch novels. There is still humor, eccentricity, and romance around the edges, yet the isolation of the setting makes the danger feel closer. Dennison also likes using the series to explore reinvention. Both sisters are trying to start over, and many of the island's residents seem to be hiding from something or rewriting who they are.

Start with Death at High Tide and move on to Danger at the Cove.

The cases stand alone well enough, but the real pleasure is watching Evie and Margot learn the rhythms of island life, decide what kind of future they want, and discover how expensive, exhausting, and strangely hopeful a fresh start can be.