I added a few of my favorite books (mostly 20th century lit) and depending on the set got mostly children's books or non-English books. Not terribly helpful.
I added Ernst Jünger's Storm of Steel and Oswald Spengler's The Decline of the West -- not because I like them but rather because I was curious what would come up as result --, it showed me mostly religious books as suggestion (He Chose the Nails: What God Did to Win Your Heart) and The C Programming Language by Brian W. Kernighan.
