The history of Guarani is a history of resilience. Paraguayan Guarani is a vibrant, modern language, mother tongue to millions of people in South America. It is the only indigenous language in the Americas spoken by a non-ethnically-indigenous majority, and since 1992, it is also an official language of Paraguay alongside Spanish. This book provides the first comprehensive reference grammar of Modern Paraguayan Guarani written for an English-language audience. It is an accessible yet thorough and carefully substantiated description of the language’s phonology, morphosyntax, and semantics. It also includes information about its centuries of documented history and its current sociolinguistic situation.