Many older people in Russia remember seeing and hearing mysterious vinyl flexi-discs when they were young. They had partial images of skeletons on them, could be played like gramophone records and were called 'bones' or 'ribs'. They contained forbidden music. X-Ray Audio tells the secret history of these ghostly records and of the people who made, bought and sold them. Lavishly illustrated in full colour with images of discs collected in Russia, it is a unique story of forbidden culture, bootleg technology and human endeavour.