Wooden Books (2001–2016)
- Sun, Moon and Earth (2001)
- Useful Mathematical & Physical Formulae (2001)
- Herbal Healers (2002)
- Platonic and Archimedean Solids (2002)
- Stonehenge (2002)
- Essential Elements (2003)
- Li (2003)
- Dowsing (2004)
- The Human Body (2004)
- Sacred Number (2005)
- Euphonics (2006)
- Perspective and Other Optical Illusions (2007)
- The Mayan and Other Ancient Calendars (2007)
- Evolution (2008)
- The Compact Cosmos (2008)
- Trivium (2016)