Imagine being called “the eighth wonder of the world.” At a 1901 dinner honouring Helen Keller (1880-1968), that’s precisely how Mark Twain introduced her to the crowd. In 1906, he described her in further superlatives when he wrote his autobiography: “She was the most marvellous person of her sex since Joan of Arc, fellow to Caesar, Alexander, Napoleon, Homer, Shakespeare, and the rest of the immortals.” Now, bestselling writer and disability rights advocate Max Wallace’s fascinating fourth book, “After the Miracle,” reclaims the life of the international icon through the lens of her pioneering political activism, including speaking out against...