What I didn't realise is that not all ebooks in Amazon are 'Read for Free'.
For anyone who uses Kindle Unlimited, do the ebooks you have to pay for, eventually become 'Read for Free'.
Also, whilst browsing the Kindle Store I happened to see that individually the Hunger Games books (1-3) are 'Read for Free', but 'The Hunger Games Trilogy' as a collection is USD $17.99.
Has anyone started off with the Kindle Store and then moved to another ebook service and if so, which one?