A high octane fast-paced locked-room thriller with a killer twist. For fans of Amy McCulloch and Will Dean.Only the bravest dare to ride the highest roller coaster in the world, Hysteria…You’re a thrill seeker who loves an adrenaline rush.You’re offered the chance to ride a roller coaster. The highest one in the world. A once in a lifetime opportunity, after hours, no queuing, no restrictions.But then the roller coaster stops. 200 metres above ground.You realise no one is around. No one can hear your scream.You’re stranded. There is no help coming. How will you escape?Praise for S. R. Masters‘Pacy, dark and highly entertaining, with a real sense of menace’ Sunday Times bestseller, T.M. Logan‘The very definition of a white-knuckle ride’ Sunday Times bestseller, B P Walter‘Brilliant… a proper page-turner’ Sunday Times bestseller, Laura Marshall‘Such a cool premise … a page-turner that kept me gripped’ Egan Hughes‘Full of twists and turns … a wild ride I didn’t want to end’ Vanessa Savage‘Had me not only staying up late to read, but for the first time ever, waking up early too’ Fliss Chester‘A claustrophobic journey that will have you constantly reevalauting what, and more importantly who, you can put your faith in. Messed with the mind in all the right ways’ Robert Scragg