First Reads is a program that gets you early access to new books across popular genres. Prime members get a free Kindle ...

Members can pick one of the books to read ahead of the official release date—and it’s totally free. (Non-Prime members can also choose one of the Kindle books for the reasonable price of $1.99.) ...

This Kindle will allow you to read for up to six full weeks on a single battery charge, and it even has a setting to tune out messages, emails, and social media for a distraction-free experience.

If you're considering Unlimited, it's extremely likely you already own some Kindle books ... you to browse the Plus Audible library, and also gives you credit for one free audiobook per month.