Gio Zararri is the pseudonym of Sergio González, computer engineer and expert coach in anxiety disorder. He wrote The End of Anxiety impelled by the need to share the process he went through to face the disorder. After the book became one of the best-selling and most praised Spanish-language books on anxiety, he has gone on to research and write a number of further best-selling books. He has appeared in news media such as Telecinco, RTVE, COPE, Radio Caracol and many others, and in magazines such as Qué leer, Trendencias and ABC bienestar.
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