The Waterside Beacon (水際の号火, Mizugiwa no Gōka) is the thirteenth volume of the Accel World light novel series by Reki Kawahara. It was released on February 10, 2013 in Japan. This title is alternatively translated as "The Signal Fire at the Water's Edge" by Yen Press.
Umesato Junior High's culture festival is just around the corner, and Haruyuki is busy helping his classmates prepare for their exhibit. While everything may appear calm in the real world, however, the Accelerated World is steadily falling into chaos. Magenta Scissor is zeroing in on Silver Crow from an unexpected direction, and even his newfound Optical Conduction ability may not be enough to avert a tragedy!