Okay I NEED to address this, because it is a SERIOUS issue. Whenever I try to complete the math level, and I have 9/10 noteboos, the 10th one sometimes doesn't even spawn! I search everywhere for it. In every room, the VCR room and others, then I eventually die to Mr.Mix because I'm too pre-occupied on finding the 10th notebook to deal with him! Mrdrnose, if you see this by chance, please make the notebooks have a more "obvious" spawn location.
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I tried EVERY location......and I'm not kidding. Albert ain't much of a guide either because sometimes he just stands there looking at me. I also viewed the map devon made, searched all of the rooms in that map that CONTAINED notebooks, and yet its always the 10th one I have to be lucky to find. But, maybe I'm just being an idiot and didn't see the nootbook in one of the rooms