Langdon, Robert John. Prehistoric Britain: The Stonehenge Enigma. Book 1

ABC publishing, 2013.
Second edition.
Have you ever wondered what civilisation brought the Bluestones 200 miles from Wales to Stonehenge? Or the reason why they undertook this monumental task? Then this book is a must for you. Robert John Langdon takes you back 10,000 years to a time when the last Ice Age melted leaving a series of smaller islands and peninsulas and not the island of Britain we see today. By revising accepted Archaeological, Geological and Topological findings, Langdon has been able to produce simple but astonishing hypotheses with compelling scientific evidence, which shows that these monuments are five thousand years older than we currently believe and built by a 'lost civilisation' the ancient Greek philosopher Plato once wrote about.