The first time you select and open an Ebook Library book, the ebook opens and is usable.
If you then want to open another Ebook Library ebook, your first ebook will reopen.
This problem occurs on all browsers. Currently the only way to clear the title is to clear the browser cache.
Proquest, the supplier of these ebooks, is working on this issue.
Some tips on how to clear your cache (note that this is dependent on browser and version of browser):