Nana Twumasi, a Ghanaian-American, Brooklyn, N.Y.-based writer and editor, has etched a niche in the wellness and self-help publishing space, an intriguing move to mesh her love of information with her creative acumen as a writer’s editor. The Oberlin College and California College of the Arts graduate has written prose and nonfiction work that has been published in various literary journals, and she’s an early disruptor in the wellness and psychology publishing space, with roles at Calli...