I've yet to see a published book on silencers with the words <font color=red>*</font><font color=red>*</font><font color=red>*</font><font color=red>*</font><font color=red>*</font>, lame, or u, in it.
Of course baring an emergency I'd never bother with any supressor that uses such rapidly consumed components such as brass screen, aluminum screeen, or rubber washers. In such an emergency a plastic soda bottle and duct tape would work just as well as the so called designs that some people are touting.
A back issue of Maxim magazine gives enough instructions on making a supressor that anyone could match the so called quality of a gunkid "can" and there are much better pictures in that rag than in any book that gunkid claims is his.