Signal Moon was a quick and easy read. I appreciate the author's blend of historical fiction and science fiction in the story; it's a unique concept. However, I found the science fiction elements to be lacking. I've read books where the explanations behind time travel or alternative timelines are well done, so this story's obscure and jumbled timeline was distracting. I wish the story had ended when the final transmission ended. That would have been fitting. The actual ending was a bit cringe.