6Hapgood's tour de force is back in print This riveting account of how earth's poles have flipped positions many times is the culmination of Hapgood's extensive research of Antarctica, ancient maps and the geological record. This amazing book discusses the various pole shifts in earth's history -- occurring when earth's crust slips in the inner core -- and gives evidence for each one. It also predicts future pole shifts: a planetary alignment will cause the next one on 5 May 2000 Packed with illustrations, this book is the reference other books on the subject cite over and over again. With millennium madness in full swing, this is just the book to generate even more excitement at the unknown possibilities.