“As far as you know?” I’ve read it and mention the above because I read it in there myself… I’m sorry I’m not rereading it for you to get the page numbers, you’ll have to get your finger out if you really want the description. 
No he’s white magick only, and in modern qigong, including at my school, you are taught very expressly to never breathe in other peoples qi.
Why? Because its imbalanced and gross, full of the results of poor diets, unhealthy modern lifestyles and uncleared emotional energy parasites from everything you cling to, from childhood traumas to the bs you watch on tv… so will make you sick.
And vamp book don’t teach you to read energy. If you can’t tead it you can’t “filter” it. Even as a baneful technique I push that crap into the Earth I don’t want to eat it, it’s truly disgusting. They have a cold you get the cold, they have cancer guess what?
And the dumb part is, the best, most abuntantly available qi is right there for the talking from the cosmos, all day every day.
But sure, “vampires”, - who are all not vamps but normal humans playing mind games, - think energy working is drinking from the muddy puddles next to the waterfall
No thought involved at all, no real intelligent understanding.
I give up. Yes, they’ll teach you this one tiny aspect of energy working without any background in safety or how the energy body actually works.
No I don’t recommend any of them they’re all 95% chaos magick and 5% qigong taken out of context and it’s all twisted so you’ll die early. If you want to do energy working do real energy working. No silly egomaniacal shortcuts.
If you want your target sick just curse her, you can’t get much energy without love anyway.