In her editorial Introduction (1–7), Thomason notes that study of the results of intense language contact – as in pidgins, creoles, and mixed languages – has hitherto been heavily biased in favor of instances of pidgins/creoles in which the lexifier languages have been European. One aim of this volume is to redress the balance by considering contact languages that have not involved a European lexifier. More significantly, this brings to the fore social and/or structural properties that differ from those in the contact languages that have formed much of traditional lore. This volume brings together studies on the following 12 contact languages: Hiri Motu (Tom Dutton, 9–41), Pidgin Delaware (Ives Goddard, 43–98), Ndyuka-Trio Pidgin (George L. Huttar & Frank J. Velantie, 99–124), Arabic-based pidgins and creoles (Jonathan Owens, 125–72), Kitúba (Salikoko S. Mufwene, 173–208), Sango (Helma Pasch, 209–70), Swahili (Derek Nurse, 271–94), Michif (Peter Bakker & Robert A. Papen, 295–363), Media Lengua (Pieter Muysken, 365–426), Callahuaya (Pieter Muysken, 427–47), Mednyj Aleut (Sarah G. Thomason, 449–68), and Ma'a (Sarah G. Thomason, 469–87).