Decades of hostilities. A chance for peace. Caught between belligerent groups, will this operation be her last? Sam “Valkyrie” Ryan is reeling. Struggling with her brother’s recent decision to make their next assignment his last, the recon specialist fights to change his mind. But she has no time to process her emotions when they’re tasked to protect a pivotal reconciliation summit between the Altered and Humans from human-supremacist terrorists. Distracted by a charming female medic, the golden-haired marine struggles to stay focused as events quickly unravel. And with the conflict becoming dangerously unpredictable, secrets from the past catch Sam by surprise as she uncovers a plot to destroy all of humanity. Can she stop a violent and oppressive history from spiraling into a catastrophic future? Of Friction is the fast-paced first book in the Altered Earth dystopian military speculative fiction series. If you like strong women, tense action, and slow-burn LGBTQ+ relationships, then you’ll love S.J. Lee’s gripping story.