A variety of different e-readers are available for ordinary digital textbook purchase. While the texts available for e-readers may not have many special features, annotation and a search feature are available on nearly all e-readers. Three of the most popular e-reading platforms are:
Inkling has a far smaller selection than the e-readers featured above, but uses a more interactive interface. Students with iPads can use Inkling to annotate, highlight, search, and research while reading. They can also use their iPads to share notes and comments with their fellow students and with their professor.