Stage 5-5 The Kingdom observatory. Tap the book on the desk and it will open. Inside is note number 1 with some compass directions. N60.W112, N45.W105, N37.W90 and N45.W75.
Tap the blue chair seat and it will tear off. Inside the chair seat is note number 2 with more directions for the telescope: S4.W37, S15.W30 and S30.W45.
Note 3 is at the foot of the ladder.
On the left is a armored guy holding a pike. Tap his helmet and it will open revealing note number 4. I’m not going to type it all out but you can observe it to see what it says.
Look through the telescope and count the number of red stars. Enter this as a code on the red star code drawer on the left: 6479. Doing this will reveal a stack of runes. Use dismantle on the stack of runes to get individual runes for each of the Zodiac symbols.
Use the notes and the map on the left wall to solve the code puzzle. Then, place the correct runes in order into the code box on the right wall that says 1234. The order to place the runes in Stage 5-5 of Doors and Rooms is: Aquarius, Aries, Libra and Taurus. Using the symbols the code is: wavy lines, T-symbol, Omega line and three quarters of an eight.
The treasure chest will open after entering the rune code. Inside the treasure chest is a secret book. Do not read this book! just kidding, it does nothing.
Use the secret book in the hole on the bookshelf to unlock the secret moon puzzle. It’s difficult to give a solution to this moon puzzle but here is how I did it. I did the left column first, the the top row. Then the second column, then the second row. Then the third row. Take it slowly, solving one piece at a time. The last row made itself automatically.
Once the Moon puzzle is complete tap the bookcase and the door will open to exit the room. That’s the end of Chapter 5 of Doors & Rooms – The Kingdom. It also marks the end of this guide to chapter 5.