This is a great website for free downloads of classic books: www.freeclassicebooks.com/index.htm
You can download them straight to your PC, laptop, phone or e-reader.
Amazon Kindle store have a large range of the classics all free of charge.
There is also the London Library Consortium's LIBBY APP. All you need to borrow ebooks through this app is a library membership from a London borough Library, most of which are allowing you to register for membership on line and providing a library card number which can be used to register and start borrowing through the LIBBY APP.