Perpetual Darkness is available now on Amazon in both e-book and paperback formats.
This is a collection of the four horror novellas I currently have available (Sunshine, Flesh Harvest, Walk in the Park and Digital Children). The links are here:
E-book UK: https://www.amazon.co.uk/dp/B00KC0QYC6
E-book US: https://www.amazon.com/dp/B00KC0QYC6
Paperback UK: http://www.amazon.co.uk/Perpetual-Darkness-Jacob-Rayne/dp/1499156413/ref=sr_1_1?ie=UTF8&qid=1403914882&sr=8-1&keywords=perpetual+darkness
Paperback US: http://www.amazon.com/Perpetual-Darkness-Jacob-Rayne/dp/1499156413/ref=sr_1_5_bnp_1_pap?ie=UTF8&qid=1403914848&sr=8-5&keywords=jacob+rayne
All four of the stories are still available individually in e-book format.