Monohydra, photographed by Hengki Koentjoro and published by Afterhours Books in 2015, is a 96-page hardcover photobook that presents a series of contemplative black-and-white images focused on water as a primary subject. Koentjoro’s photographic approach is precise and minimalist, emphasizing the interplay between water’s forms—reflections, ripples, and submerged elements—and their interaction with light, shadow, and texture. The sequencing invites the viewer to engage with fleeting, often overlooked moments in both natural and urban aquatic environments, creating a meditative visual dialogue that isolates details otherwise easy to miss. The book’s design and physical format support this immersive and intimate study of water’s ephemeral qualities.

From a collecting perspective, Monohydra stands out for its conceptual clarity and refined aesthetic that appeals to those interested in photographic explorations of elemental nature and abstract form. Hengki Koentjoro’s nuanced use of monochrome tonality and framing contributes to the work’s contemplative character. Although specific information on print run, edition size, or market history is not available, the book’s production by a specialized publisher like Afterhours Books and its focused thematic content may appeal to collectors of contemporary Asian photography and thematic photobooks on nature and abstraction. The modest print run typical for such niche art publications suggests potential rarity, but this should be approached cautiously due to a lack of confirmed scarcity data.