Download or read book Martian Rock written by Carol Diggory Shields and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Take a rocking romp through the solar system with the Martian explorers and see if you can identify the planets they discover. Orb Three looks especially familiar, but the life forms the Martians encounter there may surprise you - they're penguins