: You can purchase directly from Gallery Origami House in Japan.
The 26th volume includes a diverse array of subjects, ranging from lifelike animals to intricate geometric shapes. Satoshi Kamiya Ragdoll (Cat) Fumiaki Kawahata Rhinoceros Ronald Koh Hatching Sea Turtle Gen Hagiwara The Eiffel Tower Hiromi Takagi Architectural Twisted Ichimatsu Box Miyuki Kawamura Geometric/Modular Hippocampus Fumiaki Kawahata Mythological Purchasing and Availability
: The models in this collection vary from intermediate to "super complex," a hallmark of the Tanteidan series.
Official digital PDF versions of the full book are generally not sold. Instead, the physical book is available through specialty retailers.