It's the season for "best of" lists. Here's our look back at the year in MuckReads, from the blockbuster leak of NSA documents, to an exposé of the underground exchange of adopted children. 

What's your favorite investigative story of the year? Let us know in the comments below, or tweet your recommendation with the hashtag #MuckReads2013. Here's to much more muckraking in 2014!