In reading order
Something from the Nightside
Simon R. Green
Agents of Light and Darkness
Simon R. Green
Nightingale's Lament
Simon R. Green
Hex and the City
Simon R. Green
Paths Not Taken
Simon R. Green
Sharper Than a Serpent's Tooth
Simon R. Green
Hell to Pay
Simon R. Green
The Unnatural Inquirer
Simon R. Green
Just Another Judgement Day
Simon R. Green
Mean Streets
Jim Butcher, Kat Richardson, Simon R. Green
The Good, the Bad, and the Uncanny
Simon R. Green
A Hard Day's Knight
Simon R. Green
The Bride Wore Black Leather
Simon R. Green
Tales from the Nightside
Simon R. Green