I've only tried making my own emulsion once or twice (and VERY simple emulsion, that is)...
but I'd buy the book (DVD)as I think it is a fascinating world..
the trouble here in Denmark is the strickt laws, regarding buying and handling raw chemicals, so it might never be possible to try out more elborate recipies..
I have, however used Liquid emulsions for more than 20 years, and I think 90% of my images now are made using liquid emulsion.
A huge request, however....:
when reading a book/text from america, the quantities/temp and so on are made in a strange seperate language.. (inches/Fahrenheit/ounces/grain and so on)
but sometimes these are "translated" to redable mesurements as mm/gram/Celsius ... maybe in a "(...)"..
how are you doing your book?
also, when mentioning the chemicals, a list of international names/formulas would be nice.. So many names for the same chemical. ex. Silver nitrate (AgNo3).
then there will be no confusion for us, when trying to order the chemicals...
Apart for this request, I think your work is commandable!
I'll attach one image made with homemade emulsion - just a simple test.
(It was so much fun, and the result ok...)