Eco-Interiors by Grazyna Pilatowicz (John Wiley and Sons, 1995; 800/225- 5945). Softcover, 71/2x91/4, 181 pages. $24.95. If you make any of your living from selling interior design services, you've probably already heard some of the questions and concerns addressed in this book — questions aimed at making a new house or remodel as "green" as possible. This new book from publisher John Wiley and Sons gives you a source for answering those questions, finding green products, and helping your customers make design decisions that will tread lightly on the environment. Don't let this eco-slant scare you off, though — the book isn't preachy, and doesn't pretend that compact fluorescent bulbs will save the planet from doom. It just tries to offer some alternatives to old