Cassie Hour is both a novel and a song.
That is the clean answer for anyone searching the title: one form opens the room, the other keeps it playing after the page closes. The Cassie Hour novel belongs to the villa, the missing recording, the witnesses who saw too much and said too little. The song belongs to the chorus—the part that returns, altered, after memory has already tried to move on.
What makes the piece feel singular is the way it treats atmosphere as evidence. A Marbella villa at the edge of night. A decision made around 4AM. A story that seems to have left the table before anyone noticed the chair was still warm. The details are spare, but they do not feel empty. They feel recovered.
That is why Cassie Hour reads less like a standard mystery and more like a sealed file with music inside it. The novel carries the plot tension: who was there, what was recorded, what vanished with the chorus. The song carries the residue: mood, repetition, the afterimage of a voice you are not sure you heard correctly.
If you came here looking for the title, start with the novel first. It is where the villa, the recording, and the missing story take shape. If you came for the sound of it, follow the song next. Together, they make the same room from two angles.