I think you can find the same things he found simply by googling the author's name.
Might be a dumb question, but who is the author of said paragraph?
There were 4 authors credited for the book:
David Hill, Aaron Pavao, Michael Wich, Filamena Young
None of whom have written anything for SR (to my knowledge) for some time. Of those, I know Aaron was active until after the release of 5e... Filamena has written several other books for other systems.
Hill, and Wich are harder to pin down as there are multiple authors with the same names....