[sgslo]

Are there any recommendation engines like this that also allow filtering by books included in Kindle Unlimited?

[heinwintoe]

Not exactly what you want, but i would recommend checking this (https://recommendmeabook.com/) one out. It give you first page to read without revealing book name or author name.

[sgslo]

This is fantastic. Thanks for the link.

Always frustrating to purchase a book, read the first page, and immediately realize that it really isn't my style.

[bwb]

Amazon makes that semi illegal per their TOS is my read there. We can't even show their ratings of a product or else they stomp us.