From the other side
Why a reluctant reader will finish a book narrated by the bad guy
Reluctant readers usually stop because they can feel a book working on them. A narrator who is not on the author's side removes the thing they are resisting.
The phrase reluctant reader usually gets treated as a decoding problem, as though the child cannot manage the words. Often they can manage the words perfectly well. What they will not do is submit to a book that is obviously trying to improve them.
That resistance is not laziness. It is fairly good instincts.
Remove the thing being resisted
A book narrated by the opposition has no improving voice in it to resist. The reader is not being addressed by a wise adult, they are eavesdropping on somebody who is getting it wrong. Eavesdropping is not a chore.
This is why the perspective flip is not just a literary flourish here. It is the specific reason the book gets finished.
Length you can see the end of
The Demon and The doG is eighty three pages. That is not a limitation, it is a design decision: a reluctant reader needs to be able to hold the whole book in one hand and believe finishing it is possible.
A finished book changes a child's self description from I do not read to I read that one. Everything afterwards is easier, and it is worth choosing a first book on those grounds rather than on literary merit.
Move on page one
The other thing that loses this reader is a slow opening. Four pages of weather and family background and they are gone. Something has to be happening immediately, and preferably something slightly wrong.
One reader's summary, unprompted, was that it is a clever concept with a plot that moves along quickly and keeps a reader's interest. That is the requirement stated exactly.
It is often, specifically, a boy
Worth saying because parents ask it and then apologise for asking. A great deal of the reluctance in this age band is boys, and a good deal of what is written for the band is not aimed at them.
An adult reader's note on this one, after finishing it: very clever, and I can see how young teen boys would especially enjoy it. If they get it, they would probably laugh a lot.
The gross out humour is doing a job here, not lowering the tone for its own sake. It is a signal, sent early, that this book is not going to be improving. A reader who laughs on page three has put their guard down, and everything the book wants to do afterwards depends on that having happened.
What to say when you hand it over
Say as little as possible. A reluctant reader handed a book with an explanation of why it will be good for them has been told what the book is for, and the whole advantage is gone before they open it.
The demon is the one telling the story is enough. It is true, it is the interesting fact, and it does not sound like homework.
This is one part of faith fiction told from the other side, the idea behind both books and the podcast.