once you get into whatever section of books you are looking for, you can also sort them from lowest price to highest, instead of most popular (which I think is the default): then all the free ones come first. Also, sign up for the daily deal, so you remember to check it - these are paid for, but often very cheap indeed: there's a regular fiction and also romance, I think, on a daily basis.
Anything out of copywright (is that what I mean?) is free, sometimes in more than one format, so you can get Kipling, Dickens, Austen etc for free from there (I have just downloaded some travelogues from 1850, which I can't afford to buy as originals 🙂 ) and lots of authors offer their early books in whichever series for free, to get you hooked - plus, of course, all the self-publishers etc and also short story teasers. There's loads and loads on there for free, some brilliant and others leaving you realised you'll never get that hour back - but it's a great way to discover new authors and though I've read hundreds of Kindle books, there's only about two that were real, unmitigated dross...
There are also lots of popuylar books at 77p (which I guess equates to 1USD?), again some from well-established authors, so you can stock up your library for very little. If there's a series you really like, keep your eye on it, as there are often deals on all an author's books - I bought all the Colin Cotterils I was missing on Kindle for £3-4 each, and then the next week they were on at £1-2 each 😞 Kindle's revolutionised my life, as I travel a lot and hated leaving books behind when I'd read them- but it can also be habit-forming!
