The Taoist science is extremely thorough, and the available information on it is a lot wider than that presented with Indian Yoga. Indian Yoga is a LOT more secretive, but even with this, you can find a lot out there that can get you to a place where you can learn it from rather human or spiritual sources. Mantak Chia is the first experience I had, and was the first significant experience I had with energy work. I mean, it maybe took 2 days of half-assed, confused meditation before the thing just said, “Ok, now you will be doing it for real.” It kind of learned itself, because I don’t really know what I did.
I just started reading Dr. Johnson’s Nei Gong and Wai Gong, and I like the presentation so far. It’s a 600+ page book, so at least he doesn’t try to skip out on this book per se. However, I would say that if I hadn’t read Chia, I might not have had an idea of how to work with it. So like Mode is saying, due diligence will be able to help you get the practices you need.
At some point, I would say that direct tutelage, either from a person or a particular spirit, would be advised. However, doing the basic work can help you find that direct tutelage. You might not think it, but energy work is not as hard as it may seem, and that energy work improves things like concentration. It’s not even to me because of the concentration you need to do the energy work, but rather that having more energy increases focus, visualization, and altered state ability.
I got a lot of Bhajan publications, and his stuff is pretty decent in terms of the what he offers. Again, I would read up to try to figure out how to put the stuff together, but the exercises I have done from him are pretty good. Sat Nam Kriya is one that is hugely referred by Bhajan, and as simple as it appears, it is very demanding, and very legit. Bhajan, for it’s simplicity, is also not necessarily beginner work, especially if you are not comfortable doing asanas.
In terms of literature that encompasses a fuller spectrum, I would say Bihar Yoga books would be the best geared toward a magician if you want an outline that addresses theory, but also substantial practice. None of it is all that secret, but utilizing it could easily find you in the manner of greatly benefiting skills like divination, evocation, and other skills so that you could learn the secret Tantra.
Like Daoist work, Tantra’s roots are shamanic, so it’s all really there for exercising vasts amounts of magical power. The difference between Taoist and Indian work is that even with Indian Tantra, there is the pervasive fear or dissuasion towards utilizing power within many (not all) modes of the practice. Although Daoist Alchemy also teaches to be somewhat attached from powers, you are at the same time encouraged to learn them and use them whenever it makes sense to. But if you start with the tools we have, we could easily evoke or set up some other magic operation that would create the scenario where we could learn the exact type of Tantra or Alchemy we would need to gain the things we want from them. Either road takes you to some bad ass places, and that badassery can start almost immediately. I’m not even close to secretly initiated into anything, and the stuff is still mad “DY-NO-MIITTEE!!” If you have some sort of direction to why you are doing the work, you will often find yourself with a teacher or the appropriate knowledge well before you attempt a direct application