"Guest-expert" is a book that explores the role of guest-experts in the modern world. Authors Lang and Allen Kim have conducted an in-depth analysis and revealed a wide range of opportunities for expert guests in various fields: from public speaking and conferences to projects and research. The book offers concrete advice on how to become a guest expert, how to influence an audience, and how to successfully interact with event organizers. "Guest-expert" is a must-read for everyone who wants to increase their professional status and influence in the public space.