Accidentally forgot and added to the end?! Soto what?!

Okay, so I'm not going to ruin the ending of the book for anyone but saying exactly what occurs...
I do think that Soto really crammed in a lot of new ideas in the last few pages and I so am not buying all the coincidences that occur. This wouldn't be the first book or the twentieth that I would recommend to a student but if this happened to be the one that finally got someone to read then more power to them!