Donald is the author of six books and many articles on philosophy, psychotherapy, and psychological skills training.

• How to Think Like a Roman Emperor: The Stoicism of Marcus Aurelius (2019)
• Stoicism and the Art of Happiness (2013), part of Hodder’s Teach Yourself series
• Build your Resilience (2012), part of Hodder’s Teach Yourself series
• The Practice of Cognitive-Behavioural Hypnotherapy: A Manual for Evidence-Based Clinical Hypnosis (2012)
• The Philosophy of CBT: Stoic Philosophy as Rational and Cognitive Psychotherapy (2010)
• The Discovery of Hypnosis: The Complete Writings of James Braid (2008)

He has also contributed chapters to the following books:

• The Routledge Handbook of the Stoic Tradition (2016)
• The Beginner’s Guide to Counselling and Psychotherapy: 2nd Edition (2015), published by Sage.
• Stoicism Today, Selected Writings, Volume 1 (2014)
• Stoicism Today, Selected Writings, Volume 2 (2016)

See Donald’s Google Scholar profile for a complete list of publications.