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
Triangle Notebook Üçgen
The New, Improved Triangle Notebook by Tan Mavitan
A' Design Award and Competition - Images of Triangle Notebook by Tan Mavitan
Triangle Notebook by Tan Mavitan – The Cramped
The New, Improved Triangle Notebook by Tan Mavitan
Triangle Notebook - Fabric Hardcover Notebook - Unique Design (Navy Blue - Ivory Paper) : Amazon.com.tr: Ofis ve Kırtasiye
Notebook Triangle MINI
Triangle Notebook by Tan Mavitan | Book making, Bookbinding, Notebook