The writer Sheila Heti is known for unusual approaches, but her latest work is decidedly experimental. Heti “is one of the most interesting novelists working today,” according to The New Yorker critic Parul Sehgal. “She is ruthlessly contemporary. By which I mean, she’s not interested in writing a novel as a nostalgic exercise. She’s constantly trying to figure out  new places fiction can go. New ways that we’re using language, new ways that our minds are evolving.” To write her new book, “Alphabetical Diaries,” Heti combed through a decade’s worth of her own diaries, then alphabetized the sentences; in the first chapter, every sentence in the narrative begins with the letter “A,” and so on. “It’s fun to find writing that shouldn’t be in a novel, and to figure out, can it do the same things that we want writing in novels to do,” she shares, “which is [to] move us, and tell us something new about the world and about ourselves.” In other words, she’s not interested in experimentalism for its own sake. “I always want to write a straight realist novel,” she says. “Something proper, like the books that I love most. . . . It doesn’t happen, because I think I don’t notice the same things that those writers I love notice. I’m impatient with certain things that they were patient with.”