Of course, if you like what Doug has to say and are building your own search functionality on top of Solr or Elasticsearch, you'll want to buy his book: https:

Of course, if you like what Doug has to say and are building your own search functionality on top of Solr or Elasticsearch, you'll want to buy his book: https://www.manning.com/books/relevant-search https://www.manning.com/books/relevant-search