Kobo is an online book marketplace (similar to Amazon & Kindle). By signing up to their app you can read loads of eBooks for free. These cover fiction, non-fiction, classics and modern novels.
1) Sign-up to Kobo either via their online website or by downloading the Kobo app
2) Click on https://www.kobo.com/gb/en/p/free-ebooks to view and choose free eBooks. Below are a selection of classics