Vygotsky's 1934 book, published after his death, is often titled in English:

1. In his last years Vygotsky studied how thought and word relate. 2. The book, *Thinking and Speech*, came out after his death in 1934. 3. Some English translations title it **Thought and Language**. 4. It sets out his view that egocentric speech becomes inner speech. **Why not the others:** Genetic Epistemology is Piaget's, In a Different Voice is Gilligan's and Childhood and Society is Erikson's. _Source: Wikipedia, "Lev Vygotsky", section "Works" (revision 1377698493)_