Piper Kerman, whose memoir, “Orange Is the New Black,” inspired the Netflix series of the same name, will speak at UMass Lowell Sept. 30. Kerman’s memoir is based on the year she spent in a Connecticut women’s prison. . . . Actor Jason Segel (inset) is the latest celebrity to write a children’s book, and he’ll be at Harvard Bookstore to hype it Sept. 12. (Because the store is expecting a big crowd, Segel actually will be at First Parish Church in Cambridge.) Called “Nightmares!,” the book is about a boy named Charlie and a group of friends who face their fears to save their town. It was co-written by Kirsten Miller.