The O'Briens follows the family from The Law of Dreams two generations later: Joe O'Brien is coming of age in a new century in remote Pontiac County, Quebec, with his brothers and sisters by his side.

Their father has abandoned the family and died in the South African war; their frail mother has remarried the abusive and lecherous Mick Heaney. Joe and his siblings escape the poverty and violence of the Pontiac, but as Joe travels the continent, building an empire and a bright young family with his wife, Iseult, he is never quite able to leave his past behind.

Told from the perspectives of Joe, Iseult, and their children and spanning the construction of the Canadian railroad as well as both world wars, this novel mirrors the scope and sweep of what Wilfrid Laurier calls "Canada's Century." Tragic, romantic, and as vivid as the novel that preceded it, The O'Briens is an epic of great heart, imagination, and narrative force.