The Lighthouse Stevensons: The extraordinary story of the building of the Scottish lighthouses by the ancestors of Robert Louis Stevenson

Robert Louis was a sickly fellow, and - unlike the rest of his strong-willed, determined family - certainly not up to the astonishing rigours of lighthouse building, all of which are vividly described here.

To build these towering structures in the most inhospitable places imaginable (such as the aptly named Cape Wrath), using only 19th-century technology is an achievement that beggars belief. The comparison that comes to mind is with the pyramid building of ancient Egypt.

For instance, we learn that the ground rocks for the Skerryvore lighthouse were prepared by hand (even though the "gneiss could blunt a pick in three blows") in waves and winds "strong enough to lift a man bodily off the rock" and that "it took 120 hours to dress a single stone for the outside of the tower and 320 hours to dress one of the central stones. In total 5000 tons of stone were quarried and shipped" - and all by hand. It is mind-boggling stuff: you'll look at lighthouses with a new respect.

- Adam Roberts