Textbook in PDF format This book offers a comprehensive and authoritative survey of current research on ion–atom and ion–molecule collision dynamics across a wide range of energies. The volume brings together contributions from leading experts who present theoretical frameworks, computational methodologies, and experimental advances for understanding single and multiple electronic processes (charge exchange, ionization, etc.). The chapters cover both light and heavy projectiles impacting on atoms and molecules, providing detailed approaches and discussions on semiclassical, quantum, and molecular dynamics as well as on their astrophysical and biomedical relevance and applications