Tangram, Vol. 4 __BOOK Hashtag is a puzzle that

Hashtag is a puzzle that combines four plate-like pieces interfering with each other in exquisite balance

The Wavelinks moves in a way that's unlike anything you've experienced before

Each maze is also accompanied by a fascinating and witty short history

A difficult problem even for advanced puzzlers

Iris is built to last

Tangram, Vol. 4 __BOOK Hashtag is a puzzle thatTangram Volume 4 explores the concept of light. How does what we see affect the way we think? Two covers (distributed at random) feature static animation artworks by Takahiro Kurashima which spring to life with the help of an included lenticular lens. Astounding optical effects are illuminated throughout the issue. Inventor Minori Yamazaki captures the cosmos in a box of seemingly infinite dimension, legendary lighting designer Jules Fisher offers 14