How many days are there between full moons - think you know? Is there an ancient key to the calendar hidden in stone circles? What is the magical secret of the Sun-Moon-Earth system? If you have ever wondered about eclipses, tides or the seasons, this amazing little book by acknowledged time-lord Robin Heath will quickly introduce you to the astonishing beauty of the primary cycles around this planet. Advanced wizarding at its best! Timeless RESURGENCE. 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.