Every year the Origami Tanteidan Convention is held in Japan and along with each convention they release an awesome book with diagrams for tons of exclusive origami models. Many of the really awesome looking models you see in our blog are diagrammed in the Tanteidan Convention books.
The Japan Origami Academic Society also publishes a bi-monthly magazine called the Origami Tanteidan Magazine. Each issue is full of origami articles (mostly in Japanese although some are translated), a few diagrams usually of an intermediate and advanced level difficulty as well as a crease pattern challenge.
These books and magazines are not for beginners. there are some intermediate level models but most are quite advanced. These are for people or are looking for a challenge or who want to fold something awesome. The instructions for a lot of amazing models are exclusive to these books and magazines and you won’t find them anywhere else. Unfortunately these books and magazines are very difficult to find and a lot of them aren’t available to purchase anymore.