The answer is simply: no.

Light is a known, measurable quantity, measurable, photons bouncing and hitting film, sensors and eyeballs. You can teach light. You can explain how placing lights in certain positions will give you a certain effect, you generalize as to how most people interpret that light (soft = beauty, harsh = ruggedness, etc). You can talk about even lighting, measurable with a light meter, snoots, flags, angles, filters, gels, etc.

You can't talk about portraiture (or landscape or any major genre of photography) in those categories. The very question of "What is portraiture?" is asked in many photography and art schools, and discussed at length (ad nauseum) during years. A book can tell you poses (there are dozens of free posing guides all over the internet), but all they can really show you is what others have done and how to emulate them. Good portraiture is the result of interaction between the photographer, the subject, and the subject's surroundings.

The frustrating thing is that for every rule I can share with you about photographing people, I can show you a famous, amazing image the refutes it. Show your subjects face and eyes, right? Sure, until you see Moriyama's work.

Personally I find photographing people to be the best thing out there. It's both easy and demanding. People love seeing other people. And it's such a wide area of photography. Portraiture is everything from pictures taken at Sears, senior photos, fashion beauty shots, illustrations for magazines, formal, erotic, expressive, etc. It's 3m high prints fiber prints in museums and pictures we keep in our wallets. It's snapshots at parties and formalized shoots with a cast of dozens.

So I'm afraid that I don't have a satisfying answer to your question. I can recommend you try the ancient method of looking at portraiture you admire. Not just your favorite photos, but your favorite paintings as well. (Don't have any favorite paintings? Welcome to an amazing new world of images.) Deconstruct them, not on a technical level, but in their content. Consider their expressions and what they mean to you. Think about how you're able to shape people's perceptions of your subject by your creative decisions, by the moment you decide to capture. That micro expression, that soulful gaze, that smile, that look of disgust.

Cause that's the thing, light is a tool you can use to express yourself. Portraiture is you using that tool.