Where to start? The good: a sweet story about kids in tough circumstances. This is Ms Sharp's genre. I havent read her other books but I assume they all feature the same cast of orphans, villains, and helpers. There is nothing inherently wrong in that.
What drove me nuts was the writing. This seemed like a second draft that needed a good editor and at least three or four more drafts. There was a sentence on the first page that was at *least* ten lines long-- thoughts strung together that should never have been. First page!
Then again, the opening scene was the wrong place to start. Where was the editor? You meet the nurse. Not the main character, the nurse. Second, you met a boy, again, not the main character in the book description. Oh, wait. He was, it was just that the book jacket called him Jonny and he is Jamie in the pages. So confusing to readers. The girl on the cover? Hardly there, not super developed. Again, why isn't an editor catching all this? You buy a book assuming it's about the girl on the cover, and it's almost all about Jaime and his brother, who aren't technically orphans since their father is alive but runs away after murdering his wife. Sigh.
Along those same lines, there are way too many POV characters, I stopped counting after six.
Ms. Sharp can obviously create a sympathetic scene and portray heart-wrenching family dynamics; but this needed a thorough developmental edit and some better beta readers to call the author on trying to pass this off as a finished MS.
As Agatha Christie might say, "The Case of the Lazy Author" (more probably time-crunched, and exhausted by churning out endless orphan sagas for corporate contracts). Shame on the system that grinds writers into producing stuff like this.