Lucretius the Roman poet-philosopher is layered into the pages of Lisa Robertson's latest book of poetry, Lisa Robertson's Magenta Soul Whip. He's mentioned, quoted, revered, and interrogated, as are some of his contemporaries — Pliny, who wrote of the fall of Pompeii — and other slightly less long-gone writers like Baudelaire. Indeed, in this meaty collection of works written between 1995 and 2007, Robertson covers almost as much territory as the writers she references.