Atticus O’Sullivan, born in 83 B.C.E. as Siodhachan Ó Suileabháin, has spent much of his long life as a Druid on the run from Aenghus Óg, one of the Tuatha Dé Danann. Aenghus Óg sought the return of Fragarach, a magical sword that Atticus had stolen in the second century, and the fact that Atticus had learned how to keep himself young and wouldn’t simply die annoyed the heck out of him.
When Aenghus Óg finds Atticus hiding in Tempe, Arizona, Atticus makes the fateful decision to fight instead of run, unwittingly setting off a chain of consequences that snowballs on him, despite his efforts to lie low.
In Hounded, he gains an apprentice, Granuaile, retrieves a necklace that serves as a focus for Laksha Kulasekaran, an Indian witch, and discovers that his cold iron aura is proof against hellfire. He defeats Aenghus Óg with an assist from the Morrigan, Brighid, and the local pack of werewolves. However, he also severely cripples a witches’ coven that wasn’t exactly benevolent but was protecting the Phoenix metro area from more-menacing groups of predators.
Hexed, book two, forces Atticus to deal with that, as a rival and much more deadly coven tries to take over the territory of the Sisters of the Three Auroras, and a group of Bacchants tries to establish a foothold in Scottsdale. Atticus cuts deals with Laksha Kulasekaran and Leif Helgarson, a vampire, to earn their help and rid the city of the threats.
In book three, Hammered, the bills come due for those deals. Both Laksha and Leif want Atticus to go to Asgard and beard the Norse in their mead halls. Putting together a team of badasses, Atticus raids Asgard twice, despite warnings from the Morrigan and Jesus Christ that this would be a terrible idea and it might be best not to keep his word. The carnage is epic, with heavy losses among the Æsir, including the Norns, Thor, and a crippled Odin. The death of the Norns, an aspect of Fate, means the old prophecies regarding Ragnarok are now unchained, and Hel can begin to work with very little opposition from the Æsir. However, a strange coincidence with the Finnish hero Väinämöinen reminds Atticus of a different prophecy, one spoken by the sirens to Odysseus long ago, and he worries that thirteen years hence the world will burn—perhaps in some altered form of Ragnarok.
Feeling the heat for his shenanigans and needing time to train his apprentice, Atticus fakes his own death with the help of Coyote in book four, Tricked. Hel does indeed make an appearance, thinking Atticus might like to join her on the dark side since he’d killed so many Æsir, but she is brutally rebuffed. Atticus is betrayed by Leif Helgarson and narrowly escapes death at the hands of an ancient vampire named Zdenik, but the book ends with a modicum of assurance that Atticus will be able to train Granuaile in anonymity.
In the novella Two Ravens and One Crow, Odin awakens from his long sleep and forges a truce of sorts with Atticus, enlisting the Druid to take on Thor’s role in Ragnarok, should it come to pass, and perhaps take care of another few things along the way.
After twelve years of training, Granuaile is ready to be bound to the earth, but it seems as if the Druid’s enemies have been waiting for him to emerge in book five, Trapped. Atticus must deal with vampires, dark elves, faeries, and the Roman god Bacchus, and messing with the Olympian draws the attention of one of the world’s oldest and most powerful pantheons.
Once Granuaile is a full Druid, Atticus must run across Europe to avoid the bows of Diana and Artemis, who took exception to his treatment of Bacchus and the dryads of Olympus in book five. The Morrigan sacrifices herself to give him a head start and Atticus is Hunted in book six. Running and fighting his way past a coordinated attempt to bring him down, he makes it to England, where he can enlist the help of Herne the Hunter and Flidais, the Irish goddess of the hunt. There Atticus is able to defeat the Olympians and negotiate a fragile alliance against Hel and Loki. At the end of this volume, he discovers that his archdruid was frozen in time in Tír na nÓg, and when Atticus retrieves him, his old mentor is in as foul a mood as ever.
Also, along the way, there may have been some talk of poodles and sausages.