Ok, it sounds like there are 2 things you are stuck on - The Safe and The Mural
For The Safe
- Examine the books in the library
- Touch the relevant book
- The combination to the safe is from the Laptop. Explicit spoiler next:
Three numbers for safe are: Hands5 + Eyes, Hands5 + Eyes, Hands*5 + Eyes
So… 4 Hands + 2 Eyes would be 22
My 3 numbers were 36, 29, 58. Unsure if yours will be identical.
For The Mural
- If you don’t know the mapping of “alternate zodiac” symbols to dates then either look through the walls until you see Michael put paper in the nursery, or reload a saved game at the library and read “Stranger Stars” by Brian Monmouth
- If you do know the mapping, use the mapping, and the birth dates to push the 5 zodiac symbols in order (Croseus, Wilhelm, Heinrich, Elijah, Mordecai - I didn’t end up needing Edward). My ordering to follow in next spoiler
For me, those were, in order:
“The King In Tatters”, “The Gnawer of Graves”, “The Many-Angled Gate”, “The Spiraling Worm”, and “The Sleeper Under the Waters”. Unsure if yours can vary
I hope that helps.