1. Pearson eText Earth: An Introduction to Physical G (Recommended)
   13th edition
   ISBN: 9780135586082
   Author: Pearson Plus
   Estimated Price: $39.96 (new)
   New Retail Price: 39.96, Used Retail Price: 0.00. This is not a Rental Title. eBook Type: Web. eBook format: BryteWave Format.
2. Earth (Recommended)
   13th edition
   ISBN: 9780135188316
   Author: Tarbuck
   Estimated Price: $233.50 (new)
   New Retail Price: 233.50, Used Retail Price: 175.25, New Rental Fee: 163.45, Used Rental Fee: 116.75.