Slimward mobility--via 35 easy-to-do exercises mostly while lying prone. Also special ones for special conditions (weak muscles, post-pregnancy, etc.). Since Miss Craig demonstrates everything very clearly with photos, you can't do them wrong; and her system provides exercises for muscles in all parts of the body. It is based on studies at Columbia Presbyterian, classes at Richard Hudnut's, and private lessons at the Elizabeth Arden Salon. Guaranteed visible results within a week and only one proviso--you have to spend thirty minutes a day (or fifteen twice a day). Thus far, the season's only exercise book in a market which is always looking for a new wrinkle with which to replace the old flab.