BookBub.com. Usually gives you daily deals, anything from free or 99p upwards. then has links to sites to get them eg Amazon. I get a daily email form them with various books on offer.
I get all my audiobooks off YouTube, I listen to them multiple times every day and have done for years, so if I paid for them I'd be in debt up to my eyeballs.
Yeah just listen to them on my phone using the speaker or via a Bluetooth speaker when it needs to be louder. Loads of stuff on there.
Been on audible for years. There’s a daily deal for £1.99 or £2.99, at least one sale a month plus monthly deals between £3.99 - £5.99. I’ve an hour each way to work so average a book a week, been great as pretty much stopped reading when bought a house and started doing it up then kids came along. Also, I can’t understate how getting good narrator is for a book. When you see it’s read by the author that’s normally a red flag for me unless it’s someone like Stephen Fry.
I'd imagine some people get ebooks from torrent sites then sideload them onto their Kindles. Not me like. I'd never do stuff like that. Alternatively, buy them from Amazon
Years ago me mam wanted a supply of ebooks. I signed up to Kindle Unlimited on my ticket and forgot to tell her there was a monthly fee. She's still made up with her neverending ebooks, "and it's all free!"