Guitarist Brian May is celebrating this years Halloween with launching the Diableries and The Diabl-O-Scope augmented reality apps, enabling users to explore the underworld whilst listening to Queen. Diableries: Stereoscopic Adventures in Hell is a book published in 2013 with historians Paula Fleming and Denis Pellerin. The book was a tribute to Les Diableries,a series of 3D stereoscopic cards published in Paris in the 1860s. The cards depicted scenes of daily life in Hell, starring a series of devils, satyrs and skeletons. The app was developed by May alongside the London Stereoscopic Society and animation company Unanico. As May explained, the ghoulish images that appear in the book
