I compare acupuncture and qigong to time travel. Imagine if you were a time traveler and you wanted to convince someone who never *directly experienced* it that it was real. It isn't possible. The only way is to feel it yourself.
Acupuncture is based on lines of tendons and fascia "meridians" connecting between extremities and organs. Now "chi" at it's simplest level is nothing more than stimulating certain groups of nerves at will. And chigong is studying your internal alchemy to differentiate between the many different plexuses of nerves. For example I can concentrate on the arch of my foot up the inside of my thigh and stimulate my kidneys and adrenals. Tell me it's psuedoscience, so what? It's real to me. You just kind of have to shrug at skeptics, because they refuse to experience they can never be "convinced".
The book that really made it click for me was ironically a Qigong for Women book I think by Ferraro. But the teachers with the most complete work are Mantak Chia (internal) and Yang Jwing-Ming (external). Any book by either of those two will teach you the true science of chi, but you have to experience it for it to mean anything. All I'll say is they cure cancer with qigong, search for the studies its real; and if I got cancer I wouldn't be poisoning myself with radiation I'd be doing kungfu.