The book is well organised. The clear layout, together with the abstracts and few notes, make it easy to browse and to locate specific items of interest quickly. The publication also shows how L3 and multilingualism research has become a discipline in its own right, related to but also different from bilingualism and SLA research, dealing with its own range of complexity, as well as terminological and other methodological issues. [...] The Exploration of Multilingualism shows the challenges and diversity of multilingual research, addresses important methodological issues, and discusses significant past and recent developments. It also suggests and identifies new and exciting avenues for further investigation, as well as providing a useful list of resources, including extensive bibliographical references. As a whole, the book is an excellent starting point for those wanting a quick overview of L3 and multilingualism research, whose key message could be summarised as follows: multilingualism studies are here to stay.

- Ron Peek, Birkbeck, University of London, on Linguist List 21.2618, 2010,

Overall this volume is an important contribution to establishing multilingualism studies as a separate discipline, and it offers an exciting prospect for further exploration.

- Hongmei Xu, The University of Texas at San Antonio, in Studies in Second Language Acquisition, Vol. 33(3): 484-485,