Those terms are not mutually exclusive--King of Shadowsis both.
Yes, "Secrets in the Shadows" is a fictional book. It is a mystery/thriller novel that follows a gripping storyline involving secrets and suspense.
Stephen King is the author of the science fiction novel Firestarter
Shadows - novel - was created in 1999.
Shadows - novel - has 192 pages.
The ISBN of Shadows - novel - is 978-0192754554.
It was fiction, based on the novel by Stephen King.
"Frankestein" is a Science Fiction novel,or gothic science fiction.
The ISBN of Red Shadows - Judge Anderson novel - is 1844163776.
The ISBN of Street of Shadows - Star Wars novel - is 0345477545.
The novel "Roots and Shadows" by Shashi Deshpande has 18 chapters.
Red Shadows - Judge Anderson novel - has 256 pages.
Street of Shadows - Star Wars novel - has 308 pages.