It sounds like you are looking for a blog post or summary about the book (Murder in the Castle) by Margotte Channing . While you mentioned "Ian," the characters in this specific series are actually Aidan and Amy .
If you were looking for a different "Ian & Amy" story involving a "Cast Margotte Chan" (perhaps a specific social media creator or a different fan-fiction niche), could you please ? Otherwise,
Reviews for the book on platforms like Amazon.es mention that the story can be a bit "disorienting" at first because the focus shifts between the central mystery of the murder and the different romantic pairings. However, it is generally praised for its blend of and intrigue .