What are you allowed to do?
Generally, you can save or print several pages or chapters of an e-book for your personal use or for research purposes.
What are you not allowed to do?
It is forbidden to download or print systematically complete e-books or big parts of them. It is also forbidden to use special software for the download (like web spiders, crawlers, bots).
You must not hand the e-books to a third party in electronic nor in printed version.
This also applies to the access to saved e-books.