I read the paperback edition of this book, which is by an independent author, who clearly put in a lot of effort to ensure it is of professional quality — the cover is beautifully designed, and it has been very well proofread and edited.
Despite the fact that the book is aimed at young adults, this almost-fifty-year-old reader really enjoyed it. The writing is very descriptive, and you easily find yourself transported into the streets of Victorian London. I usually find it irritating when if I am reading an accent, especially for entire chapters, but I liked flitting between the two voices of the main characters.
I think this would be a great book for any teenager interested in Victorian Britain, and would be a great part of any school curriculum that covers that era. There is so much in the book that readers could discuss together, and also discuss in relation to today — class differences, the role of police in society, poverty, mental health treatment, women's lives, to name a few.