Unless It Moves the Human Heart is a lovely book on writing and teaching the craft of writing (more on the former than the latter). It’s not expansive in a sense that it’s full of “Do this, don’t do that” kinds of rules, but it is helpful, encouraging, and a record of delightful students in Roger Rosenblatt’s class.
Though it deals with all types of writing—poetry, short stories, and exposition—in small components because the workshop transcribed is about “Writing Everything,” the tips across genres can be used for writing in general, such as what word in a poem and why due to the context surrounding it. It’s a writing workshop at your fingertips, and Rosenblatt in this book displays his excellence and care at teaching and writing.
It’s not a clear-cut guide to writing, as it reads more like a writers workshop, but what’s discussed in this book is worth looking at for writers at any level.