Ancient Greece and the Olympics：a nonfiction companion to Hour of the Olympics Ancient Greece and the Olympics :：a nonfiction companion to Hour of the Olympics / The other title：Nonfiction companion to Hour of the Olympics Ancient Rome and Pompeii :：a nonfiction companion to Vacation under the volcano / Sabertooths and the ice age：a nonfiction companion to Sunset of the sabertooth Sharks and other predators：a nonfiction companion to Shadow of the shark Nonfiction companion to Hour of the Olympics Sabertooths and the ice age :：a nonfiction companion to Sunset of the sabertooth / Knights and castles：a nonfiction companion to the knight at dawn Penguins and Antarctica：a nonfiction companion to Eve of the emperor penguins