See pic - Corners of multiple bottom of right pages have a stain. The Blue Planet: An Introduction to Earth System Sciences, 3rd Edition is an innovative text for the earth systems science course. It treats earth science from a systems perspective, now showing the five spheres and how they are interrelated. There are many photos and figures in the text to develop a strong understanding of the material presented. This along with the new media for instructors makes this a strong text for any earth systems science course.