When a structured signal is detected from within the solar system, a small team of specialists is assembled in a sealed research facility to decode it. Years pass. The message yields - slowly, precisely - revealing not just language, but intent. It is not addressed to humanity. It is addressed to them. Each member of the team finds themselves named within the signal, described with impossible accuracy through moments no external observer could have known. The translation becomes something more than analysis. It becomes personal. At the center of it all is Yael, a linguist tasked with resolving the final ambiguities of a message that seems to understand her better than she understands herself. As the team fractures under the weight of confinement, ethics, and uncertainty, the final question emerges: What does it mean to answer a message that has already reached inside you? The Signal Garden is a cerebral, atmospheric science fiction novel about cognition, language, and the fragile boundary between observer and participant. It explores what happens when understanding is no longer passive - and when the act of knowing changes the knower.