Lion's Tail. The Pride, #2

Control the booze. Control the magic. Control Chicago. Sam Cunningham just wants a quiet life with his lover, the cheetah-shifter Alistair Gatti. But that hope is dashed when a member of Mickey Sullivan's gang dies inside the Gatti family's speakeasy. Sullivan wants Sam to work for him, deciphering long-forgotten hexes as part of his illegal hexworks operation. At the same time, a corrupt prohibition agent demands Sam and Alistair investigate the gang member's murder.
Caught between gangster and agent, they must walk a fine line just to stay alive. Because the sinister forces behind the killing are still out there, and now they have Sam in their sights.