View Spread Polar Ice Caps in Danger Jr. Graphic Environmental Dangers RL Grades 4 IL Grades 3-6 GRL M Details: Product type: Paperback Book 6-Pack ISBN: 978-1-4042-4594-5 Author: John Nelson Copyright: 2009 Reading Level: Grade 4 Interest Level: Grades 3-6 GRL: M Lexile: 640L Dimensions: 6 1/2" x 10" Paperback Book — $10.60 / $9.00 6-Pack — $63.60 / $54.00