This is a pretty consistent series and it's just a bit of fun not to be taken too seriously.
I was glad to see a lot more magic use in this book from Sage as he gains confidence but his ghost seeing ability seems to have completely been forgotten by the author as it wasn't mentioned outside of his now-exorcised father in the bookstore. I'd like to see that used more in future as I think it's something really interesting to explore, rather than this sentient baby-like convergence/lay lines that seem to be the only reason Sage has any magical abilities.
In terms of Sage and Gideons relationship, this book was also a lot more tame which I thought was a good choice as it focuses more on the plot at hand and not them just feeling each other up constantly.
Overall, a fun series to follow. ( )