2549: Obscurity
Doc writes: This is Columba’s last puzzle for The Spectator which we are pleased to publish now, three years after he retired from the series. One unclued light is the surname of the author of a novel whose title (two words) is hidden in the grid. Each word of this title has two synonyms among the unclued lights. Two unclued lights are surnames of characters in the novel, one of which can be divided into two words, each being defined by an unclued light; the other name is defined by an unclued light, which constitutes an instruction to solvers on how to treat the concealed title.