1.Understanding inner speech : historical and theoretical foundations -- 2. Thinking words in one's first language : inner speech : the L1 perspective -- 3. Thinking words in a second language : inner speech : the L2 perspective -- 4. Methodology of research on inner speech : the challenge of studying covert verbal activity -- 5. L2 inner speech : what learners say -- 6. An integrated view of the origin, nature, and development of L2 inner speech -- 7. Developing L2 inner speech : a pedagogical perspective -- 8. Synthesis and directions for further research -- App. Instructions for keeping the diary (English version).