- astrobok.zip [21-Jan-1996]
- Astronomy Without a Telescope, an interactive story book
by George Jenner. DOS executable.
- IFTheoryBook.pdf [16-Mar-2011]
- The IF Theory Reader, edited by Kevin Jackson-Mead and
J. Robinson Wheeler.
- zx81adv.zip [17-Jul-2000]
- A chapter from "The ZX81 Pocket Book" by Trevor Toms
(printed in 1981), describing an archaic text adventure
authoring system, somewhat reminiscent of the one used by
Scott Adams. "Authentic looking" HTML with GIFs. Scanned
and converted by Vasyl Tsvirkunov.