The Bog People by P.V. Glob (1969)

Across northern Europe, ancient bodies have turned up perfectly preserved in peat bogs for centuries. The Bog People is a fascinating investigation into who these iron age people were and why they were interred in the ritualistic way they were. Glob, a Danish archaeologist, found some of the best preserved examples of bog people in the 1950s and 60s, and his anecdotes on the discovery and uncovering of these bodies are a highlight. So are the amazing photographs of the exhumed bodies and the items found with them. The Bog People labours a bit toward the end but that's only a minor quibble.