To the real estate editor:
Some time ago you published an article entitled ''Designing and building a home of your own.'' In it you mentioned a book, ''This Business of Architecture, '' by Royal Barry Wills.
Do you know whether or not the book is still in print or where I could buy it? Susan Robbins Bartonsville, Pa.
The book was published in 1941 and is undoubtedly out of print. Ask your local librarian to get the book in the state library. The publisher is not known to me. F.M.H.