1. Sometimes, when I've searched every classroom and indoor corridor, and the courtyard, sometimes I only find 9, and other times I find all 10. Are there any rare secret notebook locations I should know that I'm missing, like do any of them need a blue, black, or red key to open their rooms?
2. How do I open the locked door to access the yard behind Mr. Mix's kitchen, because sometimes it's already open and sometimes it isn't and won't let me open it?
3. Also, where should I lure Viktor away from the final eleventh notebook, because even with the neodymium magnet, Viktor always breaks down the door when I'm on the 3rd problem of the final notebook?