Alexandra Y. Aikhenvald is a Distinguished Professor and Research Leader at the Cairns Institute, James Cook University, Australia. Her books include Classifiers: A Typology of Noun Categorization Devices (2000), Language Contact in Amazonia (2002), Evidentiality (2004), The Manambu Language of East Sepik, Papua New Guinea (2008), Imperatives and Commands (2010), The Languages of the Amazon (2012), and The Art of Grammar (2014), all published by OUP.