Frost Burned is the seventh novel in Patricia Briggs’ Mercy Thompson series. It feels phoned-in. Lifeless. Artificial. Once Mercy and Adam finally got together the series probably should have either ended or switched focus onto different characters (though the latter would be rather difficult given the series’ title). As it is, there doesn’t seem to be anything of particular interest left to explore here that can’t be done in the Alpha and Omega series.
Diana Roland‘s Kara Gillian series has never been one of my favorites. It was always more of a last-resort time-sink than something I looked forward to reading. That said I didn’t really dislike it either… until Touch of the Demon. The first segment is perfectly fine for the most part, but following the sigil carving scene (a high point in a number of ways) the dialog and most of the character interactions go right downhill and into the gutter.
The Infernal Devices is a steampunkish trilogy (Clockwork Angel, Clockwork Prince, & Clockwork Princess) set in Cassandra Clare‘s Mortal Instruments universe, many years before that series takes place. There are quite a number of similarities between the two. In some cases that could be seen as a negative, but in this instance at least the similarities are welcome (the main one that isn’t is the tendency for those in power to be corrupt/treasonous). In any case, if you liked The Mortal Instruments you’ll almost certainly like this.