This was really good in terms of keeping me on the edge of my seat. I wasn't surprised by the reveal, as I thought about it myself at some point of the book, but it didn't ruin the reading experience for me. In terms of the plot itself, there were a few things at the end that didn't quite seem feasible or make sense. There were so many red herrings, as is usual with the genre, and I thought the author was trying a little too hard to cast doubt on the two MCs. The blurb makes them seem horrible, but they're just... regular people. All in all, I think it's up there among Feeney's most gripping work.