The Spectre Cycle

From Author Wars - https://authorwars.com/books/the-spectre-cycle-1917219.html

Overview:

Title: The Spectre Cycle
Author: Kenneth Bulmer
Year: 2015
Type: Omnibuses
Series: Saga of Dray Prescot
Number in Series: 15

Variant Titles:

2015. The Spectre Cycle