To recommend similar books can be tough doing it through a computer system, so I thought it would be great if I as a reader had the option to suggest people books that are similar to each other.
It could be an extra part on the book page where people recommend books that are similar and maybe they would have a little bubble with a comment of the person that shared the book.
For example “I think you would also like this book because it’s a single parent + nanny romance and has the grumpy/shunshine trope as well”
English is not my native language so I hope you get what I wanted to describe.