DNF @ 51%

This seemed like a fun premise, but not particularly well executed. My issue right from the start was the choice of an American narrator. I don't want this to come across as a reflection on the narrator's abilities (I haven't listened to her other work) as much as on the choice of an American narrator for a book set in England and mainly featuring English and Australian characters. The narrator makes a valiant effort, but the accents are not good.

The narration only highlighted the times when the language also felt very American or anachronistic to me. To be fair, I'm not an expert on late Victorian British English, so I can't swear to the anachronisms, but the language didn't feel grounded in the historical context.

The characterisation also felt shallow. I could maybe buy Mary as the underestimated Victorian wife, but none of the men around her felt realistic. George's behaviour was just weird, Holmes was annoying, and Watson... was also there.

The story felt like it lacked forward momentum. By the time I got to the halfway point, I'd already skipped several entire chapters from Mary's past, and I wasn't feeling any real investment in the story, so it didn't feel worth continuing.

This book was amazing. A cross between Peter Pan and Sherlock Holmes but with a strong female lead? Perfect. I am still blown away by how creative and well written this story is. I hope she writes more in this world because I am obsessed.
The narrator was so good, she made each voice sound unique and never pulled me out of the story with weird voices, pauses, edits, etc.