This book presents a typological overview of the case system of Eastern Indo-Aryan (EIA) languages. It utilizes a cognitive framework to analyse and compare the case markers of seven EIA languages: Angika, Asamiya, Bhojpuri, Bangla, Magahi, Maithili and Odia. The book introduces semantic maps, which have hitherto not been used for Indian languages, to plot the scope of different case markers and facilitate cross-linguistic comparison of these languages. It also offers a detailed questionnaire specially designed for fieldwork and data collection which will be extremely useful to researchers involved in the study of case.