Book XXV of Deathlands. Deathlands is a world savaged beyond recognition by a centuries-old nuclear blast.  While many prosper on the savagery of this lawless land, Ryan Cawdor and his band of warrior survivalists carry the seeds of hope and courage in a daring quest to find the gateway to the future – the Tree of Knowledge.  The band are reluctant guests in a reactivated 20th century medical institute in Maine.  Here scientists still pursue abstract theories, oblivious to the realities of a world gone mad. But when they take an unhealthy interest in Krysty Wroth, the pressure is on to find a way out of this guarded enclave. Ryan’s loyalty will be tested and Krysty’s special powers may threaten her existence.