A Window in the Darkness, an adult horror novel follow-up to A Window in the Dark, is available in both print form and kindle format (which can be read on any reader). Here is a product description:
A college student, Jack Wolfe, on the verge of dropping out school, receives a mysterious message from his brother asking Jack to check on their parents in Pine Hallow, Missouri, a small and remote community that has all but disappeared over time. Jack, along with his girlfriend Emma Creek, leave in search of answers on a task that will bring them to the very edge of sanity.
You can purchase your copy Here