More like Slaughter, Incorporated

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SS-GBNovel
Len Deightonstandalone novel1978
Alternate history and spy thriller, about political intrigue, set in british isles.
“Archer's investigation collides with occupation politics, the British resistance, and rival factions of the SS and the German Army, each wanting the case to go a different way.”
from the catalogue
Hap Collins and Leonard PineSeries
series46 books1990
About friendship, set in contemporary.
“The long-running series mixes hardboiled crime plotting with the two leads' running banter and loyalty to each other.”
from the catalogue
Start with Savage Season →
Steve HarrisonSeries
series18 books1934
Mystery & detective, about murder investigation, set in early 20th century.
Start with Fangs of Gold →
Charlie ParkerSeries
series22 books1999
Set in contemporary.
“Now well over twenty books, the series has grown Parker's two associates, Louis and Angel, into major recurring characters.”
from the catalogue
Start with Every Dead Thing →
Joe KurtzSeries
series3 books2001
completed
About revenge, set in contemporary.
Start with Hardcase →
Charlie HoodSeries
series6 books2008
Set in contemporary.
Start with L. A. Outlaws →