I really struggled with this one. I stuck with it as well as I could until I got Watson's part (in first person) of the book. It lost me.
I rarely not finish a book, I will always stick it out till the end if I start a book. But when I got to the "appendices", I was just so exhausted with it and stopped there.

Don't get me wrong, the mash up is a genius one and I was enjoying it amongst the struggle until Watson's part.

So pick it up with caution.