The 12-Type Enneagram
Matthew Campling
Whitehead's Philosophy: Points of Connection
Janusz A. Polanowski & Donald W. Sherburne
Word Origins
John Ayto
Software Architecture Metrics
Eóin Woods & Christian Ciceri & Dave Farley & Neal Ford & Andrew Harmel-Law & Michael Keeling & Carola Lilienthal & João Rosa & Alexander von Zitzewitz & René Weiss
The Cambridge Handbook of Language Policy
Bernard Spolsky
A Korean grammar on semantic-pragmatic principles
Keedong Lee