In Guardian Demon, the final book of the Guardians series, things have finally escalated in the war between Guardians and hell. Lucifer has set into motion events that will allow him to break through the barrier to earth and destroy humanity. In order to stop him, the Guardians must pool all their resources together. This includes Andromeda Taylor, who, after the events that brought Michael back from hell has committed herself to leaving the guardians by “falling”.
Guardian Demon was an intense read and an excellent conclusion to these books. What made it so suspenseful was that everyone was racing against the clock to discover Lucifer’s plans for starting the apocalypse and to save loved ones who got pulled into the fire. This became direr as each move seemed to play into his hands. On top of this, Michael has finally returned from his torture in the frozen field and is committed to atoning for what he has done to Taylor before the personal clock he’s racing against runs out.
What I love about Brook is that she isn't afraid to put her characters through some pain. Just because someone has been a staple of the series since it began or has gotten their own book, doesn't mean they’re safe. Knowing that characters you love could be hurt makes the emotional impact of the battle so much more engaging. I only wish that Brook had pushed this envelop a bit more in the final confrontation and that ending of the book wasn’t so clean cut.
All in all, this was a fantastic read and a very satisfying conclusion to the series. If you’re looking to get into the Guardians, I would recommend you start at the beginning with Demon Angel since each book builds upon the other. However, if you don't want to read all 8 books in the series then at least read Demon Angel and Demon Moon prior to this one since the characters from those two books are key ones here.