Publisher's Synopsis
20 pack contains the following titles: Level 21 = Free Trade; GM Foods; Rainforests; The Story of Icarus. Level 22 = Antibiotics and Vaccines; Drilling for Oil; Germs; Run For Your Life. Level 23 = Cell Science; Gladiators; The Ideas and Beliefs of Ancient Greece; Noah's Secret. Level 24 = Race to the South Pole, Research in Antarctica; Space Tourism; The Great Pharaoh's Secret Box. Level 25 = Nuclear Energy; Skyscrapers; The Channel Tunnel; Out of this World