CHRISTINE FERRARA, a 39-year-old public affairs director for the Institute for Advanced Study, a research center in Princeton, N.J., has a passion for modern architecture and design. It began in 2008, when her husband, Steven Birnbaum, a technology consultant, bought her an airy modern home with floor-to-ceiling windows. It was to be her own little place, to decorate as she pleased without regard for his more traditional tastes or worrying that their three children might break something. ''I had seen the house on Craigslist and thought it was too frivolous to buy for myself,'' she said. ''But he gave it to me for Christmas, probably not realizing what he would unleash.'' [ABSTRACT FROM PUBLISHER]