A strange signal pulses through Deer Valley, threatening humans and robots.Wally has never questioned her life in Deer Valley, where humans and robots rebuilt after the AI Uprising. But when she hears animals' thoughts, and a trusted Peacekeeper suddenly turns violent, her world shatters.When Dr. Valerie Kaine arrives, her hidden agenda unleashes dangerous technology. Her true targets: Wally and ten other teenagers carrying neural implants from an abandoned experiment.As fear spreads, Block the CleanerBot faces exile from the community he helped build. He must stop Kaine before she activates powers that could destroy everything. Wally must unite her friends to save the only home they've ever known, even as they discover the truth about who-and what-they were meant to be.Echoes of Steel is a robot post-apocalyptic adventure about identity, found family, and the courage to forge your own destiny.The thrilling sequel to Vault's Promise