There are 4 main places to find e-books:
To access Dawsonera and Ebsco you will need to log in with dcxxxxxxxxx@student.don.ac.uk & your computer password
This guide will help you find e-books via the E-Library or web catalogue and give you an introduction in how to use them
This link explains in full how to use the Ebsco E-Book Collection to get the most from it.
This link explains how to use and get the most from Dawsonera. If you find any books here which are not in stock, that you feel will be useful to your course please let your tutor or subject librarian know.
You may find Google can provide a preview of the book you want.