Past and present meet on mysterious Montague Island. In this, the fourth book of the popular Montague Island Mysteries series of logic puzzle books (over 56,000 copies sold), Gordon Montague is working on his memoirs, which are filled with reminiscences (and puzzles) of his younger days, and his earliest experiences on Montague Island. Helping Gordon review the manuscript is Taylor, who by now is a lifelong friend—but then something happens that gives Taylor’s presence on the island another urgent purpose. From Taylor's perspective, solvers will study maps and blueprints, attend parties, meet dogs, plan a wedding, and more.