A study was conducted in order to examine the current state of the art in library network delivery of consumer information services and to develop an assessment model for the effectiveness of network delivery of citizens' information. Based on a comprehensive survey of 620 library networks, typologies for both library and non-library networks providing consumer information services were formulated. With the assistance of an advisory group consisting of experts in both library and non-library network activities, a conceptual model was developed for evaluating the effectiveness of information networks in providing consumer information. The model consisted of research questions organized into 13 areas of consideration, and an interview guide was developed for testing and refining the model. Five library and four non-library networks providing consumer information services were selected for in-depth case analyses. These analyses, which were derived from the interview guide, reflected the history and present status of the networks, as well as the short-term and long-term concerns of network staff on the provision of consumer information services. Major similarities and dissimilarities among the networks were evident; the findings of the case analyses were used to modify the original assessment model. The methodology and results of the study are briefly presented in this summary final report. (Author/ESR)