Google Play will soon have Textbook purchases and rentals9
all five major publishers: Pearson, Wiley, Macmillan Higher Education, McGraw-Hill, and Cengage Learning. As yet, it is unclear exactly what books will be made available.
It is also unclear what the pricing will be, but Google has promised that textbooks will feature a discount of "up to 80%" compared to the traditionally ludicrous textbook pricing. And, even better, Google will also be offering a rental option which will let you use the book for 6 months at a reduced cost.