[nkjnlknlk]

> And personally, I think book recommendations are an absolutely underserved market

I haven't read about the industry in years but isn't it the case that the job of "book recommendations" is essentially the publishers job? They unironically try to sell you more than a book. An algorithm would threaten their worth.

(There are, of course, other useful functions like publishing and the irreplaceable editors, but neither require the capital strength of marketing.)