If you know the work of a particular architect well, you can often spot his or her preferred forms, identify favored materials, or discern a particular aesthetic. But that is not the case with the buildings of Fernanda Canales, a Mexican architect known for her small but polished body of work. Each of her projects looks as though it could have been created by a different designer. Among her single-family residences, one urban house is a Modernist composition of crisp, overlapping and projecting white concrete boxes, while another, in a popular vacation area, is a rustic assemblage of stone-enclosed volumes with pitched roofs supported by exposed timber structure. And her Casa Bruma, in a secluded community about 100 miles southwest of Mexico City, is a village-like cluster of discrete one- and two-story structures formed in assertive black concrete.