|The canonicity of this article's subject remains dubious. Though it doesn't contradict official continuity, it has not been referenced in any confirmed canonical material.|
"Demons of the Hellmouth" is a fully licensed guide to the vampires and other demons that flocked to the Sunnydale Hellmouth in Joss Whedon’s cult TV series Buffy the Vampire Slayer. This in-universe illustrated guide is written by Rupert Giles, and also contains handwritten notes from Buffy and Willow. This unique book promises a diabolical romp through the highlights of the beloved show.