In The Frontier Calls: Two Spirits, One Adventure, the second volume in the Wolf's Tales series, seventeen-year-old Isa O'Toole rides deeper into the untamed West...where survival demands more than grit, and faith is the only compass that never fails. Having begun his vision quest in the shadow of bloodshed and doubt, Isa-half White, half Comanche-now faces a harsher frontier. With his Lakota wife Awentia, a loyal wolf, and his one-man pony, Isa is no longer just seeking purpose...he's living it, one perilous step at a time. But the frontier doesn't forgive weakness. Ambushed by Arapaho warriors, stalked by grizzlies, and caught in the rising flames of the Plains Indian Wars, Isa must battle not only enemies on horseback but the ghosts within-memories of past killings and the weight of a destiny he's still learning to bear. As friendships deepen and dangers close in, Isa realizes his calling reaches far beyond himself. The answer to his vision quest lies not in revenge or mere survival, but in forging peace between clashing worlds and building a future grounded in faith, family, and the land. Can Isa lead others toward harmony in a land built on division? Or will the price of peace be more than one young man can carry? For readers of Young Adult Western Fiction, Christian Historical Fiction, and high-stakes Coming-of-Age sagas, The Frontier Calls: Two Spirits, One Adventure is a pulse-pounding journey through America's rawest lands-where two spirits share one path, and every mile matters.