The Library of Why Library Set List: $210.16 / S&L: $157.60 Library Set Reading Level: 3-4 Interest Level: 3-5 Product type : Library Set ISBN : 978-0-8239-7666-9 Copyright : 2004 Language : English Category : Science Pages : 24 Trim : 7 5/8" x 7 1/8" Subject : Science Other titles available in The Library of Why Why Do the Oceans Have Tides? The Library of Why Library Bound Book Library Bound Book List: $26.27 / S&L: $19.70 Why Did the Dinosaurs Become Extinct? The Library of Why Library Bound Book Library Bound Book List: $26.27 / S&L: $19.70 Why Can Airplanes Fly? The Library of Why Library Bound Book Library Bound Book List: $26.27 / S&L: $19.70 Why Does It Rain? The Library of Why Library Bound Book Library Bound Book List: $25.27 / S&L: $18.95 Why Are the North and South Poles So Cold? The Library of Why Library Bound Book Library Bound Book List: $26.27 / S&L: $19.70 Why Do Some Animals Shed Their Skin? The Library of Why Library Bound Book Library Bound Book List: $26.27 / S&L: $19.70 Why Is Earth Round? The Library of Why Library Bound Book Library Bound Book List: $26.27 / S&L: $19.70 Why Is the Sun So Hot? The Library of Why Library Bound Book Library Bound Book List: $26.27 / S&L: $19.70