Browse open-source e-Books

[raisedadead]

As a user I want to be able to:

• [ ] browse open-source e-books while offline.
• [ ] search and download e-books when online for later reference, within the app.
• [ ] get a set of 5 e-books to start with when installing the app covering some topics (TBD)
• [ ] delete books when I want, to save space.