Coenen & Coenen, Principles of Constitutional Structure

I'm happy to recommend Principles of Constitutional Structure, a new book in West's hornbook series that, as the ad copy says, "offers an overview of federalism, the separation of powers, and related matters of constitutional structure." It's by Dan T. Coenen & Michael Coenen. Although it grew out of a book on the Commerce Clause by Dan Coenen, I was drawn to it by its broader scope and specifically its treatment of separation of powers. I can't say I've read it from cover to cover, but what I've read is clear, interesting, and well-sourced. Kudos to the Coenens.