If you enjoy mil-sf, you are going to like:
Mick Murphy’s an Irish half-elf from Manhattan. His best buddy Dave is a dwarf from Brooklyn. Together with a company of misfits, screwballs and, well, trolls from the pit, they’ll take on anything Austro-Hungaro-Romania, or for that matter Hell itself, cares to throw at them.
But behind the vampires, werewolves and sky demons are the Big Boys, deep down in a pit of their own. The War won’t end until G.I.s plant their boots on the Devil’s throne and kick him out. Working their way up to this biggest of D-Days is going to tax the United States Army to its utmost … but the dogfaces on the Line are one step ahead of the brass, because they’re already halfway to Hell.
If you have read Operation Renfield, that is included in a revised and expanded version, plus a second adventure for King Company.