Neanderthals have developed a radically different civilization on a parallel Earth. A Neanderthal physicist, Ponter Boddit, accidentally passes from his universe into a Canadian underground research facility. Fortunately, a team of human scientists, including expert paleo-anthropologist Mary Vaughan, promptly identifies and warmly receives Ponter. Solving the language problem and much else is a mini-computer, called a Companion, implanted in the brain of every Neanderthal. But it can't help his fellow scientist back in his world, Adikor Huld, when the authorities charge Adikor with his murder.

In this Hugo-nominated novel, an alien walks into a museum and asks if he can see a paleontologist. But the arachnid ET hasn't come aboard a rowboat with the Pope and Stephen Hawking (although His Holiness does request an audience later). Landing at the Royal Ontario Museum in Toronto, the spacefarer, Hollus, asks to compare notes on mass extinctions with resident dino-scientist Thomas Jericho.

Experimental psychologist Jim Marchuk has developed a flawless technique for identifying the previously undetected psychopaths lurking everywhere in society. But while being cross-examined about his breakthrough in court, Jim is shocked to discover that he has lost his memories of six months of his life from 20 years previously - a dark time during which he himself committed heinous acts.

Beyond the walls of the small village of Mythen Rood lies an unrecognizable landscape. A place where overgrown forests are filled with choker trees and deadly seeds that will kill you where you stand. And if they don't get you, one of the dangerous shunned men will. Koli has lived in Mythen Rood his entire life. He believes the first rule of survival is that you don't venture too far beyond the walls. He's wrong.

Rosewater is a town on the edge. A community formed around the edges of a mysterious alien biodome, its residents comprise the hopeful, the hungry, and the helpless—people eager for a glimpse inside the dome or a taste of its rumored healing powers. Kaaro is a government agent with a criminal past. He has seen inside the biodome, and doesn't care to again—but when something begins killing off others like himself, Kaaro must defy his masters to search for an answer, facing his dark history and coming to a realization about a horrifying future.