Saturnine and quick-tempered, the formidable North Sea is often overlooked - even by those living within a stone's throw of its steel-grey waters. But as playground, theatre of war and cultural crossing-point, it has shaped the world in myriad ways, forged villains and heroes, and determined the fates of nations.

It's not all grim, though: the seaside holiday was born on North Sea beaches, and artists, poets and writers have been as equally inspired by glinting sun on the wave-tops as they have the drama of a winter storm.

With a wry eye and a warm coat, Tom Blass travels the edges of the North Sea meeting fishermen, artists, bomb disposal experts, burgermeisters - and those who have found themselves flung to the sea's perimeters quite by chance. In doing so he attempts to piece together its manifold histories and to reveal truths, half-truths and fictions otherwise submerged...