Oh dear. Don't read this thinking it's going to 'fill the gaps' in A Christmas Carol. It definitely won't. I have three major criticisms of this book. The first, unforgivable flaw is the writing and language. It's written in a style that is supposed to mirror Dickens' own writing, and whilst it works in places, there are far too many others in which it doesn't. It's written in US English, so has z instead of s, favor instead of favour etc., coupled with far too many instances of US English words and phrases such as 'gotten' and 'come live with them' instead of 'come and live with them'. Even when you consider that some of the phrases and words in the original may have fallen out of use, these are glaring errors in something that purports to be written in the same style. Shame on the author, editor, and publisher. And before anyone cries xenophobia, it's a matter of bringing any non-US English speaker out of the book in short order. Any sense of expecting a reader to suspend their disbelief vanishes with such inattention to detail.
Secondly, the book is overly twee, sickly sweet in places, and has far too religious an angle. The spirits become a horde of God-channellers, and it's definitely at odds to the way Dickens described the Church. Making them agents of Christ was a step too far. There's one passage at the point that Jacob meets his spirit 'guide' and it is vomit-inducing tweeness. Proclaiming that he doesn't know what feeling has come across him, but that he knew it as a child, to which the spirit tells him he's feeling 'love'. Good grief.
Thirdly, the second half of the book, and I mean the whole second half, is essentially just a retelling of A Christmas Carol from the time of Jacob's visit. Whole swathes of the original text are reproduced verbatim, with a small number of additional sentences or paragraphs clumsily tacked on to try and explain things from the author's odd and disjointed view of why Jacob is there.
This is not the story of Jacob. His life is not explored, and when the author wants us to believe that Scrooge is only saved because Jacob takes on his bad deeds as his own, then wakes up rid of those debts of life, it makes a mockery of the story of redemption that Dickens told us. It is a gooey, mess of a book, and a shameless cash-grab, worthy of Scrooge and Marley themselves.
If you love A Christmas Carol as I do, please, don't read this book. It is AWFUL.