'In this two-volume Cambridge handbook, Mufwene and Escobar have assembled four dozen novel studies on linguistic change, as induced or conditioned by migration, language contact, multilingualism and population structure. This hefty new reference work provides an important resource on language change in the living context of human societies.' George van Driem, Chair of Historical Linguistics, University of Bern 'What a treasure! - two volumes, 47 chapters, written by the foremost authorities, dazzling in the depth and breadth of its coverage of all aspects of language contact. A truly monumental contribution, destined to be the go-to reference for decades to come.' Lyle Campbell, University of Hawai'i, Mnoa 'With its global scope and inclusive approach, this work offers the most comprehensive overview of language contact to date. With contributions from leading specialists in each topic and region under the leadership of Mufwene and Escobar, the Handbook provides authoritative and state-of-the-art coverage of a vibrant and rapidly evolving field.' Stephen Matthews, University of Hong Kong 'Impressive.' Maggie Scott, The Year's Work in English Studies