The Split Worlds series is published by Diversion Press. The complete series is currently available in ebook, audiobook and paperback format.

This series needs to be read in order, so if you haven’t read Between Two Thorns, (and then the next 3 books!) I’d recommend starting there and then coming back to this one.

Here’s a very spoilery blurb:
From Emma Newman, the award-nominated author of Planetfall and Between Two Thorns, comes the long awaited conclusion to the Split Worlds series, described by Locus Magazine as “an intriguing mix of modern world, Victorian/Regency England, and faery.”

“A triumphant merger of Victorian values with modern magic” —Library Journal on A Little Knowledge

As the Iris family consolidates their hold on society within the secret world of the Nether, William Iris finds himself more powerful and yet more vulnerable than ever. His wife, Cathy, has left him, a fact that will destroy him if it becomes public. To keep his position—and survive—he needs to get her back, whatever the cost.

Cathy has finally escaped the Nether, but hates that she must rely so heavily on Sam’s protection. When the strange sorceress Beatrice offers her a chance to earn true freedom by joining the quest Sam has been bound to, Cathy agrees. But can she and Sam navigate Beatrice’s plans for the future without becoming two more of her victims?

And Beatrice, a self-taught and powerful killer, is not without her enemies. Rupert, the last sorcerer of Albion, is obsessed with finding and destroying her. He orders Max and his gargoyle to help him, pulling them away from protecting innocents. As the Arbiter and his partner face the ugly side of their responsibilities to Rupert, they begin to question where their loyalties should truly lie.

Amidst death, deceit, and the fight for freedom, friendships are tested, families are destroyed, and heroes are forged as the battle to control the Split Worlds rages to its climatic conclusion.

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Blue Book Balloon wrote a fantastic review of All Good Things.

Where you can buy it

Links to all the different ebook versions and the paperback (US) can be found here: Amazon/Kobo/Google/iBooks etc
UK Kindle edition: UK Amazon

UK Paperbacks can be bought from:

UK Amazon
The Book Depository
Wordery

The audio book version is on sale now too, available in all the usual places!