The 15th book in the "Dresden Files" is called "Skin Game." A full list of all of the books in Jim Butcher's series "Dresden Files" can be found on his official website.
"Skin Game" was released in both the US and UK on May 27, 2014. "Skin Game" is the last book of the series, as no subsequent books have been announced, as of 2015. Jim Butcher is a popular New York Times bestselling author whose "Dresden Files" series has been wildly successful. "Skin Game" is available for sale through book retailers as well as through the official Jim Butcher website.