The Shetland Sea Murders is the ninth in the series of Shetland Sailing Mysteries by Marsali Taylor. The protagonist is feisty Cass Lynch who sails her beloved boat Khalida around Shetland, stumbling across mystery and murder along the way. The author weaves dialect and local landmarks into her prose and helpfully includes an index at the end for soothmoothers (those not from Shetland).