The authors of this book , Maria Barnas and Hans den Hartog Jager , describe their findings in a personal , poetic and investigative manner , while being supported by art history references and other cultural phenomena. Their in-depth approach illustrates how this body of work lets our perpetual sense of reality slip as it invades our senses. Yet this extraordinary environment , that grounds the past in the present , is simultaneously undetermined as it feels close to our sense of particularity.