1 Introduction to Grid-Forming Inverters. 2 Requirements and Grid Standards for Grid-Forming Inverters. 3 Power System Requirements for Grid-Forming Converters. 4 Towards Performance-Based Requirements and Generic Models for Grid-Forming Inverters. 5 An Overview of Modelling and Control of Grid-Forming Inverters. 6 Small-Signal Modeling and Validation including State-Space and Admittance Models of the Virtual Synchronous Machine. 7 Grid-Forming Control of Doubly Fed Induction Generators. 8 Damping Power System Oscillations Using Grid-Forming Converters. 9 Grid-Forming Dynamic Stability under Large Fault Events - Application to 100% Inverter-Based Irish Power System. 10 Virtual Oscillator-Controlled Grid-Forming Inverters Incorporating Online Parametric Grid Impedance Identification. 11 Grid-Forming Inverters Interfacing Battery Energy Storage Systems. 12 Operation of Grid-Forming Inverters in Islanded Mode.