The aim of this book is to present a comprehensive picture of the current state of Spanish learner corpus research (SLCR), which makes it unique, since no other monograph has focused on collecting research dealing with learner corpora of any language other than English. In addition to an introductory appraisal of current SLCR, as well as a wake-up call reminding us that learner corpus design still needs to be improved, this volume features a selection of original studies ranging from general issues concerning learner corpora compilation to more specific aspects such as phonetic, lexical, grammatical and pragmatic features of the interlanguage of learners of Spanish, as reflected in corpus data.