There are two ways to find eBooks for your topics:
Search the Library Catalogue  with your keywords and then limit your search results by Type, e.g. Book and Format, e.g. Web. You can also refine your search results by Language.
Use an eBook database to find eBooks:
ACLS Humanities E-Book 
Provides full-text and full-page-image access to titles in most humanities disciplines and in area studies. The books included have been recommended by scholars as significant contributions to their respective fields.
The CRCnetBASE eBook collection has a wide selection of eBooks featuring scientific and technical references and resources.
eBook Collection (EBSCOhost) 
A collection of eBooks, in multiple subject areas, available on the EBSCOhost platform. EBSCOhost eBook collection contains titles that were previously part of the Netlibrary collection.
Oxford Reference Online 
Oxford Reference Online provides online access to a range of dictionaries and reference titles which includes "The Oxford Companion to Australian History" and THE "Visual English Dictionary".
Oxford Scholarship Online 
Oxford Scholarship Online is a cross-searchable library containing the full text of hundreds of books published by Oxford University Press. Access available to: Philosophy, Political Science, Religion.
ProQuest Ebook Central  (combined with EBL and ebrary)
Ebook Central delivers, with breadth and depth of ebooks from scholarly sources, including University Presses and other top publishers. ProQuest Ebook Central integrates the strengths of EBL and ebrary onto a new enhanced more comprehensive ebook platform. You can view books online in your browser choosing the Available for Online Reading option. If you choose Available for Full Download you may first need to install the relevant software. Check the Ebook Central Help  section if you have questions. These books can be downloaded for 14 days with Adobe Digital Editions .
Safari TechBooks Online 
A custom eBook collection that contains a subset of 800 titles from Safari Books Online
Wiley Online Library 
Provides full text access to journals, reference works, books, and databases published by Wiley in all the science disciplines.