- Visible Learners: Promoting Reggio-Inspired Approaches in All Schools
- Earth 2: Society Vol. 2: Indivisible
- Prehistoric Man Researches into the Origin of Civilisation in the Old and the New World
- Brain-Weight and Size in Relation to Relative Capacity of Races: Read Before the American Association for the Advancement of Science, at Buffalo, N. Y., 25th August, 1876 (Classic Reprint)
- Prehistoric Annals of Scotland, Volume 2 - Primary Source Edition