Setting up a Kindle family setup is simpler than it first appears, especially if you're already in Amazon's ecosystem. I went through this last holiday season trying to get my mom, my sister, and myself all sharing books without constantly buying three copies. The core is Amazon Household, which is their umbrella service for sharing digital content. You can add one other adult and up to four kids to a Household. After you create the Household online through your Amazon account settings, you just invite the other adult via email. Once they accept, you can enable sharing for specific content like apps, audiobooks, and, crucially, ebooks. The main library owner's purchased books become available for the other adult to borrow.
But here’s the real trick everyone stumbles on: not all books are shareable. Publishers decide that. You’ll see "Lending: Enabled" on a book's product page if it can be shared. My sister was excited to read a new thriller I bought, only to find out the publisher had disabled lending. It was a letdown. For the actual devices, each person uses their own login on their Kindle or the app. The shared library doesn't just appear; the borrowing adult has to go to the 'Content Library' on their device, switch to the 'Household Library' view, and find the book to send it to their device. It's not automatic, and that extra step trips people up. I wish it was more seamless, like a merged shelf.
We also use the kid profiles feature for my niece’s tablet. That part works well—you can curate a specific library for them and set time limits. Overall, it’s a powerful feature buried under some menus and publisher restrictions. Once it’s running, it saves a decent amount of money, but the initial setup and discovery of what can’t be shared is the frustrating part. We mostly share older bestsellers and classics now, which almost always have lending enabled.