'Star Trek: Deep Space Nine'!

Just read this in TV listings:
“The Changing Face of Evil: … Winn is shocked to find the book of the Kosst Amojan has blank pages, but then learns how to reveal the text.”
I like it! Religious texts with Invisiclues! Something like “Work out for yourself how to live virtuously, but if you get stuck, here are some hints:”.


It is funny, Invisiclues and Infocom text adventures were before my time.

But in the 90s as a kid I remember having invisible ink books for non-computer games, such as quiz books that came with revealer markers, and “paint with water” coloring books.

This is the same principle I guess? I looked it up and that is what it looks like.