Reading challenges are popular among readers who blog. It is a fun way for readers to encourage themselves to read many books in a certain category. I recently came across a particularly fascinating reading challenge at the blog Classical Bookworm. She proposes that since the UN has designated 2008 as International Year of Planet Earth (IYPE), a book challenge be held in honor of the event. She suggests that readers read books about our “dynamic planet” and outlines some different ways to approach the challenge.