Yup-- that's the one mark-- Windrow's books is my favorite.... I daresay I like it better than Mr. Paine's book. The first chapter focuses just on materials to use for dioramas- from grasses, soil, rocks, different products for water, plaster and Celluclay, etc.....and he spends a lot of time going into detail that Shep just doesn't go into.
I learned many more techniques reading that book.....I love even the chapter on trees...