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
All four of the stories are still available individually in e-book format.