This book, the first of its kind, is dedicated to different Spanish varieties spoken in the Amazonian regions of Peru, Ecuador, and Colombia. The contributions present diverse perspectives on theoretical, methodological, and descriptive characterizations of the study of Amazonian Spanish. It includes linguistic (phonological, syntactic, discourse-pragmatic), typological, ethnographic, sociolinguistic, and language contact approaches. The analyses of oral corpora include comparisons between monolingual and contact varieties of the speech of bilingual speakers who are native speakers of an indigenous Amazonian variety. This collection contributes to the fields of Hispanic and Amerindian Linguistics, and language contact.