If you were going to choose one book over the other, which one would you go with? I'm hoping you'll say "Ultraviolet Disinfection Handbook" cause that will get delivered much faster...
The idea I'm working from is an in-line UVC virus killer to sterilize exhaled air from covid positive people who are using CPAP/BiPAP/whatever. And if you happen to have a metal housing available, you could use same principle to sterilize inhaled air for a healthy person. You should probably be able to use plastic/PVC housing for exhaled air for a somewhat short term basis, but not inhaled air due to photo degradation of plastic, ie undiluted unhealthy fumes. So, target is "quick" kill with no recirculation. Due to variety of available UVC sources (or un-availability as it may be for some people), I'm attempting to create a reference design that is easily modifiable based on your available UVC source, or prove that the source is inadequate. That's the idea anyway. I have 3.5W, 60W, and 100W UVC bulbs of different geometries ordered and I'll have 2 of them within the week.
Whether or not my idea works out, the most important thing is getting the right information so people don't hack something together out of desperation, think it's working, but the bulb is grossly inadequate, for instance.