Best book covers of 2015.

Last Friday, Matt Dorfman, an art director at "The New York Times," picked his favorite book covers of 2015. I found his criteria interesting. And worth thinking about.

"When considering the book as a whole, I prefer that the interiors contain answers and the covers ask questions. To the extent that my favorite reading experiences empower me to confront uncomfortable truths and honest answers about people, societies and the greater universe, the covers that lure me into the pages often do so by posing questions that I don’t want to ignore."