This story is a slow burn, a change in pace compared to the last two series I’ve read from Crawford. The tension between Ruby and the angels feels palpable, real hold your breath sort of thing, but it took a while to get there. It’s probably because this is not the usual paranormal spy novel. In fact, the spying part doesn’t kick in until halfway through the novel, but it doesn’t distract from a good read. I’m definitely going to download the next in the series.