Book excerpt: This volume contains the proceedings of the 3rd International Conference on Polymer-Solvent Complexes and Intercalates held in Besancon, France in August 2000. As the reader will discover, results from various topics involving polymers, polyelectrolytes, polymer-like systems (self-assembling molecules, biological molecules), surfaces etc. were presented and discussed. They highlight the growing impact of this field on various scientific domains, and also the building of a scientific community concerned by the same questions.