Simplify the following text for a Grade 19 native English-speaking person.
Original: James attributed this rise principally to `` the stiff breeze of the special bookselling body of publishers , editors , illustrators , producers of the pleasant twaddle of magazines ; who have found their ` dear , ' our dear , everybody 's dear , Jane so infinitely to their material purpose , so amenable to pretty reproduction in every variety of what is called tasteful , and in what seemingly proves to be salable , form . ''
Simplified: James said that this was mostly because of the `` stiff breeze of the special bookselling body of publishers , editors , illustrators , producers of the pleasant twaddle of magazines ; who have found their ` dear , ' our dear , everybody 's dear , their material pretty reproduction in every variety of what is called tasteful , and in what seemingly proves to be salable , form . ''