Spider Shepherd: SAS (Volume 1) - Stephen Leather
Six Spider Shepherd short stories in one volume, back when he was in the SAS. The short stories are Hard Targets, Natural Selection, Narrow Escape, Warning Order, Hostile Territory and Rough Diamonds.
The short stories were all published individually and then were brought together for this collection. They offer a glimpse into Spider’s military career, in the days before he became an undercover police officer and worked for MI5. Many of the characters who appear in these stories reappear in the Spider Shepherd novels.