Susan Gelman (2003). The essential child: Origins of essentialism in everyday thought. Oxford University Press.

Susan Goldin-Meadow (2003). Hearing gesture: How our hands help us think. Harvard University Press

Jean Mandler (2004). The foundations of mind: Origins of conceptual thought. Oxford University Press

Michael Tomasello (2003). Constructing a language: A usage-based theory of language acquisition. Harvard University Press.

Angeline Lillard (2005). Montessori: The science behind the genius. Oxford University Press.