I recommend starting with Dawn of the Sorceress, Sorceress Awakening, and then Sorceress Rising before reading this. The background is quite important to full enjoyment of this book. I like the writing style, the characters, the storyline and the descriptions. These may not be to everyone's taste, but I thoroughly enjoyed the story.
This continues the adventures and romance of Lillian (Dryad, Gargoyle, Sorceress, Avatar) and Gregory (Gargoyle, Protector, Avatar). With Tethy's sacrifice, the Riven have been destroyed. But all the magic has alerted Canadian and United States military that something unusual is going on. Investigations put the fae and Coven at risk of discovery. The Lady of Battles is still scheming, and her Commander Gryton is on the scene; but he seems to have his own agenda. Lillian is pregnant, and her brother Shadowlight has a new human pet. Corporal Anna Mackenzie, the pet, is not too happy about it; but he did save her from being converted to a Riven, and then saved her from dying of injuries sustained in the big battle. Gryton sets his nefarious scheme in action, and it takes the combined efforts of the fae, Coven, gryphons, Avatars and hamadryad to foil his plot. The hamadryad's solution to the situation takes everyone by surprise. To be continued...