Every day, Amazon puts some of their ebooks on sale either really cheap, and sometimes free. To find these free books, you go to the Kindle Store choose the type of book you want to find (cookbook, novel of some kind, DIY, etc) and then have the selection shown by price , from low to high. You will get all of the free books in that selection first, then the 99 cent ones, and so on, and it shows if they are on sale usually. If it is hard to remember to check every few days, you can sign up for a book email website like Bookbub.com or bookgorilla.com. I use both of those, and really recommend them. When you register (free) you choose the genre of books you want to receive sale information about, and then they send you an email every day with those books that are currently on sale. Most of them, you can get on other websites besides amazon, also, if you usually buy ebooks some other day. These sale books are sometimes only on sale for a day, so when you go to buy one that says it is free, always look at the current amazon price for the book, in case it has changed since the list came out. Using this method, you can amass a huge online library for almost no cost, which is what I am doing, and then organizing them into collections by topics. Here is an example of one on sale today, and I thought it might be of interest to @John Brunner , since he has that specific iPhone. https://www.amazon.com/dp/B0BB4SZV9G/ref=nodl_?dplnkId=2b9d042c-63d6-44f7-b29f-45612a7c0e57 I read a lot, so I also have Kindle Unlimited, and with that , you can borrow many kindle books for free and keep them as long as you want to, as long as you have no more than 10 books at any one time.