Getting Crafty -- Triangle Notebook Collage | Marion and Ed Hughes Public Library
Triangular Notebook folds Neatly Out into Square Shape | Designs & Ideas on Dornob
Nuuna Playful Thoughts Notebook - Philadelphia Museum Of Art
The New, Improved Triangle Notebook by Tan Mavitan
Triangle Notebook - Mustard
Triangle Notebook
So a while ago I asked about anywhere that may sell a triangle notebook similar to St. Germain's from the anime. My mum then made me one for my birthday!! : r/castlevania