'I Wonder Why Pyramids Were Built' and other questions about ancient Egypt, from Kingfisher books. Rrp £5.99 so get it for LESS than half price here! Colourful, surprising and full of information, the I Wonder Why books have set thousands of young minds buzzing. I Wonder Why Pyramids Were Built is the perfect introduction to ancient Egypt, featuring pharaohs, amazing mummies, hieroglyphs and more. Glossy paperback. Approx 28cm x 23cm.