Theorizing and Analyzing Agency in Second Language Learning: Interdisciplinary Approaches, edited by P. Deters, X. Gao, E. R. Miller, and G. Vitanova, New York, NY, Multilingual Matters, 2015, xii + 281 pp., $39.95, ISBN 978-1178309-288-8 (pbk). Issue 2 (3rd April 2019)