A bit of a mixed bag. I was very interested in and intrigued by the new world-building things revealed here about angelic origins and whatnot. The introduction of a particular new character was lovely and made some facts clear about angelkind. I will say the resolution to that problem was a bit anticlimactic, though. I really didn't care for the plot related to Elena's family. 

This felt the a bit of a wrap upon the series in the form of a very long epilogue?  I'm not sure where Singh will be going from here.