21. George: Speedball Lettering Books. 1923-1952.

Current editions of the "Speedball Lettering Books" are at #21. #7 was produced in 1923 and a new edition was produced about every four or five years. It is difficult to say which one of the group is the best as elements of one book migrated into newer books over the years. Still, as a group, they contain some outstanding artwork and design ideas. Due to their accessibility, many signpainters acquired the books and used them constantly.

22. ITC & ICS- Correspondence School Textbooks. 1924-1935.

During this period, the International Textbook Company and International Correspondence School produced dozens of sign-related books. Actually these were textbooks usually sharing some of the same chapters. E.L. Koller is credited with much of the text and illustrations used in the textbooks and he did produce a similar set of stand alone books with much of the same information. However, the ITC and ICS group of books are still common and must have been used often by signmakers. Besides the books dedicated specifically to signs and showcards, many were also available on the subjects of wallpaper, tile, stained glass and other crafts and were usually well illustrated.

	23. Martin: Martin's Idea Books 1-4. 1935-1937.
H.C. Martin produced his "1000 Showcard Layouts" in 1928. This group of four "Speedball" sized booklets showcased Martin's later work with even more zest and eye appeal than the original book. #4 was produced in 1937. The entire group was reported to have been combined into one single book sometime after that. The group of four are fairly hard to find but are a real source of design inspiration.

24. Strong: Detroit School of Lettering 1-10. 1905.

C.J. Strong owned and operated the Detroit School of Lettering along with a mail order supply department. This group of ten booklets are about the same size as a normal "Speedball" lettering book, but slightly thinner. It seems that C.J. himself wrote the text and did the illustrations for the booklets. The first four booklets deal with the "Rudiments of Lettering", the second group of two are on "Showcard Writing" and the last four on "Theory and Practice". When viewed as a group, they do make up a very impressive "book". A full set of ten of these booklets would be a rare find.

25. Campana: The Artist and Decorator. 1925.

D.M. Campana produced a large number of books related to the graphic arts between 1920 and 1948. Other titles include "Decorative Design 1-4" and "The Teacher of Monograms and Lettering". "The Artist and Decorator" is leans heavily towards the Art Nouveau period with notable influence of Alphonse Mucha. Each plate is beautifully illustrated in grayscale. His books probably weren't mainstream sign books, but would have been welcome additions to any sign maker's collection of the time.