Kei Miller’s list of Emerging Writers of an Emerging World for the 2021 International Literature Showcase fizzes with hope, like an old-timey musical. Spring is bustin’ out all over, and it’s named Caleb Azumah Nelson, Daisy Lafarge, Gail McConnell, Helen McClory, Ingrid Persaud, Jarred McGinnis, Mícheál McCann, Rachel Long, Sairish Hussain and Steven Lovatt. There is something for everyone: six novels, three volumes...