Man, I keep seeing people ask for these definitive "top 100" lists and I gotta say, I'm a little skeptical they exist in any truly meaningful way. Amazon's charts are a mess of algorithms—bestseller lists get conflated with 'top rated,' and the sheer volume of review-bombing and early-release review clubs makes the rating number itself kind of a fiction.
What I ended up doing was going to the Kindle Store page and using the advanced filters. Sort by 'Avg. Customer Review' but then also filter for 2024 publication date. Even then, you'll get a weird mix of obscure non-fiction with five perfect reviews sitting next to the latest Rebecca Yarros. My list ended up being heavy on romance and self-help, which might not be what you're after.
The most useful thing I found wasn't a static list, but following the 'Readers also enjoyed' rabbit hole from a book I already liked. That led me to 'The Women' by Kristin Hannah holding a solid spot, and a surprising amount of love for that new Travis Baldree slice-of-life fantasy, 'Bookshops & Bonedust.'
Trying to chase the absolute top 100 feels like trying to nail jelly to a wall. The ranking shifts hourly.
Totally. Those official lists always feel a bit... corporate. I rely way more on the Kindle Unlimited category charts. If you go into, say, Sci-Fi & Fantasy, then sort by 'Most Read,' that's a way better proxy for what's actually popular among readers right now, not just what sold a bunch of pre-orders.
Lately, I've noticed a huge chunk of the most-read stuff there is from ongoing web serials that got a Kindle release, like 'Mother of Learning' or 'Beware of Chicken.' Their ratings are through the roof because the audience followed them from RoyalRoad. It's a totally different ecosystem.
So my top 100 would be full of those progression fantasy and litRPG titles that the mainstream lists completely miss. It's all about where you look.