Towards the second half of this decade several major telescope facilities operating in the infrared submillimeter and millimeter wave bands will become operational. These missions are expected to throw much light on our understanding of the the star formation phenomenon, which is addressed as one of the primary science goals in these wave bands. This book is the proceedings of the "Cores to Clusters" workshop held at Centro de Astrofisica da Universidade do Porto during 7 - 9 October, 2004 to discuss current and future issues in star formation physics in the light of these Next Generation Telescopes.