This is a valuable text for the Public Health officer trying to decide what a GIS expert can add to his or her program. It is easy to follow without being simplistic but at the same time reliable. It is a valuable bridging text that introduces GIS to Public Health professionals or those thinking of entering that field and similarly aspects of public heath to the GIS expert or the student learning GIS. And for those of us utilising confidential medical records this book contains a very valuable discussion on confidentiality of records and how to utilize these data productively and safely displaying results without breaching that confidentiality.