Thatched roofs are like living organisms: each one a web of repair, replacement and alteration, shaped, dressed and re-moulded by every pair of hands that works on it. Thatching is one of the world’s oldest crafts – an ancient trade that roots us in nature, as Tom Allen discovered when he quit an office job to become an apprentice in Devon.

Now a master of the trade, in On the Roof he goes in search of its history and future, meeting fellow thatchers, from the son of a lobster fisherman who thatches with a dune grass in the Hebrides, to a Syrian refugee who found peace among the seagrass roofs of Denmark, to one of the first women to master Japan’s 5,000-year-old thatching tradition. Eye-opening, beautifully told and revealing a tradition hand-shaped over centuries, On the Roof is a story of how we live with the land and how we have chosen to treat it.