| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1998 | 978-0-9668254-0-4 | Master Hui Son Choe | Hap Ki Do: The Korean Art of Self Defense |
| 1999 | 978-0-9668254-1-1 | Hui-Son Choe | Hap Ki Do: The Korean Martian Art of Self Defence: Practical Hap Ki Do Textbook |
| 2000 | 978-0-9668254-4-2 | Master Hui Son Choe ยท Hui-Son Ch'oe | Hap Ki Do: A Guide to Black Belt Studies |