...., I have not been happy with most PSD texts books and been toying with the idea of writing something suitable to be adequate for Federal and Provincial Legislation. .
That would be awesome! I'd buy the first copy!
The LGS one is a good starting point but I agree, there could be more in there. I've seen all the old DRI stuff and its even more basic, even at the time - I'd love to see the new DRI stuff but I understand you need to take a course to get it (my curiousity isn't worth the few thousand $ it would cost me to take a training course in order to get a book).
I don't believe ERDI or PSDA have any texts of their own... Does anybody know for sure?
I've always felt the NAUI materials were the best for rec stuff. More detailed with various explantions, colour, diagrams etc (especially the dive tables!)