All the Dead Shall Weep by Charlaine Harris

Book five in the Gunnie Rose alternate-history fantasy series
follows gunslinger Lizbeth Rose as her husband Eli abandons
her after a miscarriage, a private militia invades her
Texas-border town, and magic, betrayal, and gun battles
culminate in the death of Eli's brother Peter and a fragile
reunion.

This book’s main concerns are; adult–minor sexual activity (not
explicit), animal abandonment/butchering/neglect, dark content
(witchcraft/magic), gore, murder, necromancy, rape/sexual
assault (referenced), sex exploitation, sexual activities (not
explicit), and violence.