From the bestselling author of The Promise, the thrilling story of one of the most momentous contests in American history, the Battle Royale between Obama and h

A ball drops to the ground. Leaves fall from a tree. Gravity is at work all around you. But what exactly is gravity? And how does it affect different objects? R

“A true classic of world literature . . . A masterpiece that has inspired generations of writers in Nigeria, across Africa, and around the world.” —Barack

"A beacon of guided inspiration to illuminate the dark night of the soul." -Donna Henes, author of The Queen of My Self "The lightning that streaks through thes

More powerful and affluent today than ever, the United States has promising opportunities to influence the course of history. Yet these prospects are shadowed b