Here are a few questions related to the Myst games. The "*" represents the location of the letter used for the message.
What we have so far:
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randandrobynmiller
-1. Wants you to collects the red pages
-2. Use the right keys here to reach the Stoneship Age
-3. Wife of Atrus
-4. An Age from Myst in the treetops
-5. The age shown
here-6. Answer to
this equation-7. Exile Age consisting of flora
-8. Monkey-like creature in Revelation
-9. Myst V
-10. You control their actions with the tablets
-11. Thinks of themself as The Grower
-12. Age writer's father
-13. Starting point in Exile
-14. Sings "Curtains" in Serenia sequence
-15. Age in Exile dealing with electricity
-16. Linking book saved in Exile
-17. Crystal Age in Revelation
-18. Tusked water creature in Riven