This state-of-the-art volume presents an outstanding collection of 22 studies on current issues facing research in second-language acquisition (SLA). The editors sought contributions for this volume from seasoned veterans of SLA like Lydia White and Susan Gass, from well-known researchers in linguistics and/or first-language acquisition like Haj Ross and Harald Clahsen, and from relative newcomers to the field like India Plough and Jean-Marc Dewaele. The topics covered range from the role of universals at various levels of second-language (L2) knowledge; the way that linguistic knowledge is represented by L2 learners; the changing nature of linguistic theory itself; and the definition of usage phenomena like style shifting and code switching. The introduction to The Current State of Interlanguage gives a concise yet detailed overview of research in the field over the past 10 years, and focuses on the present growing concensus on a number of issues that were at one point highly controversial.