On May 24, 1869 a one-armed Civil War veteran, John Wesley Powell and a ragtag band of nine mountain men embarked on the last great quest in the American West. The Grand Canyon, not explored before, was as mysterious as Atlantis—and as perilous. The ten men set out from Green River Station, Wyoming Territory down the Colorado in four wooden rowboats. Ninety-nine days later, six half-starved wretches came ashore near Callville, Arizona.Lewis and Clark opened the West in 1803, six decades later Powell and his scruffy band aimed to resolve the West’s last mystery. A brilliant narrative, a thrilling journey, a cast of memorable heroes—all these mark Down the Great Unknown, the true story of the last epic adventure on American soil.

    They peer deeply into Trump's White House – at the aides pressured to lie to the public, the lawyers scrambling to clear up norm-breaking disasters, and the staffers whose careers have been reduced to ashes – to paint an unparalleled group portrait of an administration driven by self-preservation and paranoia. Rucker and Leonnig reveal Trump at his most unvarnished, showing the unhinged decision-making and incompetence that has floored officials and stunned foreign leaders. They portray unscripted calls with Vladimir Putin, steak dinners with Kim Jong-un, and calls with Theresa May so hostile that they left her aides shaken. They also take a hard look at Robert Mueller, Trump's greatest antagonist to date, and how his investigation slowly unravelled an administration whose universal value is loyalty – not to country, but to the president himself.