How do you predict eclipses using Stonehenge? Why were blue' stones brought all the way from Wales? What is the secret geometry of seven eights? Packed with rare old engravings, clear explanations and exciting new research, this beautiful and enlightening little book for wizards of all ages by renowned author and lecturer Robin Heath will leave you fascinated, educated, amused and amazed. WOODEN BOOKS are small but packed with information. Fascinating FINANCIAL TIMES. Beautiful LONDON REVIEW OF BOOKS. Rich and Artful THE LANCET. Genuinely mind-expanding FORTEAN TIMES. Excellent NEW SCIENTIST. Stunning NEW YORK TIMES. Small books, big ideas.