In these electronic book databases you can not only view e-books in their entirety, but you can perform keyword searches on the content of the e-books when you don't know which particular book you need.
E-books are also available through the Novanet catalogue.
Ebooks that Dalhousie owns are included in Novanet. To find ebooks on your topic, first run a search and then "Tweak" your results. Select "Full Text Online" and then "Books." The resulting list should contain only electronic books.