This book presents the current state of the art and best practices concerning national forest inventories (NFIs) for monitoring wood resources, and demonstrates pathways toward harmonisation and improved common reporting. Beyond providing a general overview of the availability and use of wood resources in different countries, it presents a unique collection of original contributions from national forest inventory experts featuring in-depth descriptions of current National forest inventory methods for assessing wood availability and wood use in European countries, as well as selected countries in America and Asia. The main topics addressed are national definitions and improvements in common reporting of forests available for wood supply, stem quality and assortments, estimation of change including growth and drain, and tree resources outside forest land. The book is a must-have for everyone whose work involves national forest inventories, and for all those who want or need to understand the information NFIs provide on the availability of wood resources. By providing reliable information, it represents a valuable resource for scientists involved in scenario modelling and analysing the effects of climate change, as well as individuals at private organisations and public authorities working to promote the sustainable use of natural resources and to harness the potential of green economies.