> for me and a friend, show me the rarest book we have read in common Got to your Friends page (https://www.goodreads.com/friend https://www.goodreads.com/frie

> for me and a friend, show me the rarest book we have read in common Got to your Friends page (https://www.goodreads.com/friend https://www.goodreads.com/friend), click on "Compare books" in front on the friend with which you want to compare. You will see the list of books you have in common sorted by inverse popularity.