ListenUp's engineers, editors, and quality control professionals listen to more audiobooks than anyone else we know. We asked them, along with other behind-the-scense folks what books they loved this year. Keep reading to find out their favorite audiobooks of 2014!

Our amazing narrators intimately know the books they read, so we trust their recommendations for which ones are the best. Today, we are highlighting our narrators' favorite non-fiction titles of 2014. Check out their suggestions below and let us know your favorite non-fiction book ...