A five-time author and founder of Personality Junkie, A.J. (INTP, 5w4) launched the platform in 2009 to explore personality typology as a pathway to clarifying identity, purpose, and vocation. He has devoted over twenty years to studying and writing about personality, drawing on Jungian theory, the Enneagram, and the Big Five to help others understand themselves more deeply.
Widely recognized for his contributions to Myers-Briggs® typology, A.J. has written internationally acclaimed books, including the world’s best-selling INTP guide, establishing him as a trusted voice in personality studies. His work blends intellectual rigor with accessibility, offering insights for both newcomers and seasoned readers seeking clarity and personal growth.
In addition to his personality work, A.J. is the creator of Man of Fire, a new Substack project and newsletter for men who refuse to trade their aliveness for comfort, cynicism, or a slow retreat from life. There he explores what it means to think deeply, risk boldly, and cultivate courage, energy, and intentional action in both work and relationships, helping men pursue a life of intensity, meaning, and authentic presence.
Elaine Schallock has been an ardent follower and student of personality theory since she was first introduced to the Myers-Briggs taxonomy over 20 years ago. A true Jungian, she began conducting independent research and writing about typology in 2010, shortly before beginning her collaboration with A.J. and Personality Junkie. She recently published her long-awaited first book, Beyond Rare: The INFJ’s Guide to Cultivating Growth & Self-Awareness.
Elaine’s theories and insights are responsible for shaping much of the material found in Personality Junkie’s blog posts and type profiles. Along with these contributions, Elaine is skilled at helping others understand themselves and facilitating their personal growth within the context of typology. She has used this gift over the years to provide personal advice and insight to readers seeking more direct guidance.
As an INFJ, Elaine is especially passionate about depth psychology and understanding the subconscious factors that come into play with respect to psychological type. Her work has focused largely on the inferior function and its role in the individuation process. You can find a list of Elaine’s recent posts here.
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