How Mosaics Work asks why a mosaic works as an image: what pieces, relationships, light, scale and viewing distance actually do. It focuses less on technique and more on what viewers see: why an image works from one distance and falls apart from another, how value and direction change perception and why the finished mosaic may behave differently from what its maker expected.This book will keep developing. When evidence or experiments change my understanding, I will revise it. Buy it once and receive future online versions while I continue developing it.