No man is Boon’s equal, no gun more lethal. Boonsri Angchuan travels the trails, riding from town to town with her one and only friend, a portly Arkansan drunkard named Edward Splettstoesser. She has done nothing else for years, her only goal being revenge upon the one man who should have protected her but instead sold her and her mother into bondage. From Texas to the New Mexico Territory, from the filthy backstreets of San Francisco’s notorious Barbary Coast to the ghost town of a depleted placer mine, Boon and Edward navigate corrupt lawmen, hostile Kiowa, a mad judge, and countless gunmen aiming for their heads in Boon’s dogged pursuit of answers—and vengeance.

It’s been a decade since Boonsri Angchuan and Edward Splettstoesser parted ways in California at the bloody end of her original vengeance trail. Now, she finds herself in the middle of a South American war with a new partner to tell the tale, a young Mexican woman named Lily Contreras with a dark past and more than a little blood on her own hands. And Boon’s vengeance hasn’t been doused yet—she is on a mission to find her mother, dead or alive, beginning with the one man she believes can tell her where she is. From the Chilean pampas to the high Pacific seas and the unforgiving Sonoran Desert, Boon and Lily forge a new trail against military madmen, murderous mutineers, cowboy killers, and la Guardia Rural, all of whom will taste the Vengeance of Boon.

The epic saga of Boon Angchuan ends— —but not before she finally finishes her bloody quest. Edward Splettstoesser and Liliana Contreras have been on the trail together for the better part of a decade, searching for their long-lost friend Boon. After so many dusty miles and bitter disappointments, they finally track her down to a Wyoming prison and begin hatching plans to break her out. But all hell breaks loose, and in the middle of the pandemonium is “the Frenchman,” one Emile Champlain, who may very well hold the long-sought secret of what truly happened to Boon’s mother, Pimchan. The chase is on, from the Wyoming State Prison to a hellish confrontation at a cattle ranch, ultimately leading them to the frozen, far-flung Alaskan and Western Canadian wildernesses in the throes of the Gold Rush. There, Champlain holds court over his ill-gotten fiefdom and awaits the final showdown with the wildest woman in the west. The explosive conclusion to the Boon Trilogy, A Requiem for Boon is her biggest, bloodiest, and most consequential adventure yet, where the fates of her and her dearest friends all hang precariously in the balance.