Introduction: The High-energy Corona – Waves, Eruptions, Particles -- Introduction: The High-energy Corona – Waves, Eruptions, Particles -- Particle Acceleration During Flares -- Magnetic Complexity, Fragmentation, Particle Acceleration and Radio Emission from the Sun -- Review of Selected RHESSI Solar Results -- RHESSI Results – Time for a Rethink? -- Small Scale Energy Release and the Acceleration and Transport of Energetic Particles -- Large-scale Disturbances -- Large-scale Waves and Shocks in the Solar Corona -- Energetic Particles Related with Coronal and Interplanetary Shocks -- Particle Acceleration at the Earth’s Bow Shock -- On the Existence of Non-maxwellian Velocity Distribution Functions in the Corona and their Consequences for the Solar Wind Acceleration -- Recent Research: Large-scale Disturbances, their Origin and Consequences -- Plasma of the Solar Corona -- Quasi-periodic Pulsations as a Diagnostic Tool for Coronal Plasma Parameters -- Pulsating Solar Radio Emission.