The Bad Place

From Author Wars - https://authorwars.com/publications/the-bad-place-440306.html

Overview:

Title: The Bad Place
Author: Dean R. Koontz
Year: Unknown
ISBN-10: 0747234442
Publisher: Headline Feature
Price: £5.99
Pages: [8]+500
Binding: Paperback
Type: Novel
Title Reference: The Bad Place
Notes:
5th printing, unknown date; p. [4] : "First Headline Feature paperback in 1991"; number line : 10 to 5.
Overseas price : A$14.95 (recommended).
No cover art credit, but attribution to Graham Pott is supported by the style and the fact that he illustrated the other Koontz volumes of Headline Feature paperbacks at the time.