More people than ever are discovering Dungeons and Dragons, the tabletop roleplay system that lets you adventure with your friends while playing as fantasy characters. But planning and running your own game can be intimidating to newcomers - where do you start? Justin Alexander is here to help. He's the writer behind The Alexandrian, a well-known trove for new and seasoned Dungeon Masters alike. He's known for teaching readers about gameplay mechanics in a fun, approachable way, breaking down each aspect of gameplay to its barest essentials. He's here to teach you everything you need to know about D&D, from understanding and enforcing rules to designing your own dungeons. There's no need to suffer through dense game books - tabletop is meant to be fun, and Justin makes it easier than ever to start a successful campaign that your players will remember for years. With detailed maps, schematics, tables and more, this book includes a variety of tools and advice for any aspiring game master, so you can build your world and get right to playing.

This book describes interactions of plant viruses with hosts and transmission vectors in an agricultural context. Starting with an overview of virus biology, economics and management, chapters then address economically significant plant diseases of tropical and subtropical crops. For each disease, symptoms, distribution, economic impact, causative virus, taxonomy, host range, transmission, diagnostic methods and management strategies are discussed.