Kare-sansui 100 Illustrations is a book that provides visual explanations of 100 different kare-sansui gardens, a traditional Japanese landscape garden style that features rock arrangements and minimalist use of plants. These gardens are designed to evoke a sense of tranquility and the essence of nature, often using carefully placed stones and raked sand to represent mountains, rivers, and other natural elements. The book likely offers insights into the principles and techniques of kare-sansui garden design.