There are 9 books in the The Last Oracle series. The newest book is The Book of Destiny which came out in 2020.

1
The Book of Secrets

Book cover of The Book of Secrets
Helena Davies just wants a job that will get her out of her parents’ basement. Instead, by the end of her first day at Abernathy’s Bookstore, she has a dead boss in the basement and the news that she is now a part of an endless magical war.

Abernathy’s is…
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2
The Book of Peril

Book cover of The Book of Peril
As the custodian of the oracular bookstore Abernathy’s, Helena has faced any number of challenges in learning her new role. But when the store begins giving out false prophecies, Helena comes up against her greatest challenge yet: how can she fix Abernathy’s when she doesn’t truly know how it works?Armed…

3
The Book of Mayhem

Book cover of The Book of Mayhem
With two threats to the oracular bookstore Abernathy’s behind her, Helena finally feels secure in her role as custodian. But when a new danger rises, it threatens not the store, but the magi of Portland. As tensions between the factions grow, and monsters terrorize the city, the conflict tests Helena’s…

4
The Book of Lies

Book cover of The Book of Lies
For over seventy years, the use of familiars—monsters bound by magic to fight beside humans in the Long War—divided magery into two factions. Now, the monsters strike back.As Helena prepares for the Conference of Neutralities, reports of familiars breaking their bonds to attack and kill their masters raise tensions between…

5
The Book of Betrayal

Book cover of The Book of Betrayal

Helena Davies knows all about keeping secrets.

Now her secrets will come to light.

Helena’s encounter with a terrible creature whose kind arebent on destroying the world revealed a terrible truth: a cabal of rogue humansworks with those monsters, intent on gaining power. Charged to remain silentwhile her superiors prepare…

6
The Book of Havoc

Book cover of The Book of Havoc
With a successful challenge to the Accords behind her, and her relationship with Malcolm Campbell made public, Helena Davies’ life seems perfect.Then the attacks begin.As the enemy magi known as the Mercy wreak havoc on Warden strongholds, Helena and the oracular bookstore Abernathy’s play their role in guiding the Wardens.…

7
The Book of Harmony

Book cover of The Book of Harmony
With the Mercy’s attacks on the Wardens neutralized, Helena prepares for her upcoming wedding to Malcolm Campbell. But when Helena steps into the oracle’s space and finds herself somewhere unfamiliar, the mystery threatens to destroy the Wardens’ tentative peace.Having no explanation for the oracle’s strange behavior, Helena reaches out to…

8
The Book of War

Book cover of The Book of War
Helena and the oracular bookstore Abernathy’s stopped an attack by the alien invaders’ human allies and destroyed their attempt at a second oracle, giving the Wardens much-needed victories. Now, after months of fighting a defensive war, the Wardens plan a direct assault on the enemy stronghold.But as the battle approaches,…

9
The Book of Destiny

Book cover of The Book of Destiny

The stunning conclusion to THE LAST ORACLE series!

Helena has come far from the day she became custodian of Abernathy's, the world's only living oracle. Now, she faces her greatest challenge yet: the oracle's prediction that it, and she, will end.

As monstrous invaders strike city after city, leaving death…