Gr 6 Up-These two profiles are well written and well organized. Both texts include information on the subjects' education, awards, career highlights, and details of their research and discoveries. McClintock is portrayed as an independent, jazz-playing woman whose work in the field of genetics earned her a Nobel Prize and led to advances in cancer research and immunology. Mayer was also a Nobel Prize winner, sharing in the 1963 prize in physics with Eugene Wigner and J. Hans Jensen for their work that led to a new understanding of the structure of atomic nuclei. In spite of the complicated subject matter, the authors make the discoveries and research approachable and fairly easy to understand. Solid additions, given the specialized subject matter.-Christine A. Moesch, Buffalo & Erie County Public Library, NY Copyright 2003 Reed Business Information.