Does anyone know if Luis, the author and photo process specialist, is still with us?
I ran across an obituary for a Luis Nadeau born 1947 who passed away Oct 10th, 2022 in a Quebec hospital. Luis' biography lists him as having been born in '51 but this seems rather close.
Hard to find anything else about him, or anything more recent—his Encyclopedia of printing, photographic, and photomechanical processes, which comes up in most searches about him, dates from 1994. Seems to be totally off the grid, which is remarkable these days.
There's an email address at the bottom of the page. Might still work.