Bestselling author Laura Schlessinger, whose radio talk show offers advice on marriage and family, has hit a chord with her latest book, The Proper Care and Feeding of Husbands. HarperCollins reports 293,000 copies in print after seven trips to press. Dr. Laura has been doing some bookstore appearances on the West Coast, with more scheduled in other parts of the country. Among her many media stops was a full hour with Larry King.