The book describes the results of a 3-year longitudinal study of kindergarten through 2nd-year students in both U.S. and Australian schools. Both quantitative and qualitative data were collected to investigate the development of analogical and mathematical reasoning in young children and to look for possible relationships between these two constructs. Lyn English, the editor of the book, characterizes both types of reasoning in an introductory chapter. The findings of the study are then reported in a set of six chapters, written by different members of the research team. Three leading researchers in the field of analogical reasoning, Usha Goswami, Giyoo Hatano, and Tomomi Sakakibara comment on the study in two concluding chapters.