Here are the key things I vaguely remember from 30+ years
- There's a secret code in the book based on a simple substitution cipher using a # character - example below.
- It was shelved in my Jr. High library next to Dark Wing by West and MacLean
- Sci-fi/dystopian - I think. I know when I reread Dark Wing, I was surprised it wasn't in that book.
Excuse the poor representation of something that is way easier to draw.
For the letter a the glyph ̲| would be used. b is .̲| and c is .̲.̲|. Ergo cat would be .̲.̲| _̲| ‾|
Anyone else remember this story?