Sir John Lister-Kaye has adopted a very familiar format in his new book of wildlife encounters. Essentially he charts a single 12-month cycle in the life of the Scottish Highlands near his home at the Aigas Field Centre, just to the west of Inverness. The author has lived in the region since the 1960s, when he was lured north out of a business career to take up work with the famous naturalist Gavin Maxwell.