Popular Home Decoration, by Mary Davis Gillies (HC, 1940, $3.50)
(Gillies was the associate editor for McCalls Magazine.)
This is a great book to answer your questions on how to decorate your home in a modern 1940s look. Personally, I liked looking at the before and after pictures. My own house has been redecorated in the last 10 years, and it looks just like the before pictures! Obviously, 1940s modern is not my style. Still, this book is a gem. Look for it in the home arts section.