Seventy years later Edward Mackay wakes after a major brain trauma. In the hazy shadowlands of illness, he conjures the figure of his dead father, a man he knew so little about. This near-death experience provokes a move to the wilds of Orkney, where Edward joins a project to harness the tides around the island as a renewable source of energy. But in the tight-knit island community passions also run high.
These were my thoughts on it after I had read it:

What a magnificent book - I never wanted it to end. Greig has such a delightful way with language, whether local Scots or English. He is also a poet and this is very evident in his lyrical prose. In Another Light is the moving story of two men - father and son. The son, recently recovering from a near-death illness becomes obsessed with learning more about his father's life before he met his mother. The novel is set partly in Penang, where the father served as a medical officer, and partly in Orkney, where the son is working on a renewable energy project. The story of the father twists and turns and at times runs parallel to the son's life until it all comes together in the last few pages. It is a fast moving plot and the mystery surrounding his father is revealed clue by clue, with a final twist to the mystery right at the end.