browse goodreads! go to local author talks! go to a local book club ran by someone well-read! totally agree with the above supporting long form review publications like the new york/ london/ paris review of books; they typically will write about a general topic whose sources are 1-3 books that are listed. If the long form piece peaks your interest you know exactly where to dig in for more information.

Best seller lists skew towards "branded" writers typically pushing (in my opinion) a diluted version of an existing thought that is re-marketed for our time. There is nothing new under the sun, so stick to the classics. Life is much too short to read mediocre books. (: