Quantum Gravity

A series by Justina Robson.

After the Quantum Bomb of 2015, there are six worlds. In no particular order, they are: Alfheim, Faery, Demonia, Thano topia, Zoomenon, and Otopia.

Skip ahead a couple generations and meet Liles. Lila Black is a cyborg, with a functioning AI, which is slowly meshing with her. She's magic-scarred from an earlier job gone wrong in Alfheim. She comes from Otopia, and is a member of the Agency, a national security service focusing on inter-world interactions. It's her job to spy on an Elvish rock star named Zal, while hidden as a bodyguard. On their first meeting, they get into Game, a type of wild magic that binds them until one of them loses or dies. Games create strong impulses enough to turn murder charges to manslaughter, so losing isn't really a pertinent option, and both Lila and Zal are shaping up to live a good, long time.

Lila has to go to various worlds, and... things get weird. There is more mystery than she can imagine, and the only way to figure it all out is to dive right in herself.

Well. It is with Lila, anyway.

Later books show a good deal more focus on other characters, and the amount of focus on other characters seems directly proportionate to how much Lila is getting over herself. Whether this is intentional is up to the reader.

Books: Keeping It Real, Selling Out, Going Under, Chasing the Dragon, Down to the Bone

Oh, and despite having a character named Glinda, it has nothing to do with the Wicked song "Defying Gravity".

Tropes used in Quantum Gravity include:

Aborted Arc: That whole seventh world thing which was made to look like a really big deal just got sort of quietly dropped after it's inhabitants appeared without much fanfare.
Action Girl: Ms. Lila Black, everybody!
The Archer: Zal, though the cool, calm part only comes out when he needs to fight.
Author Appeal: Zal
Battle Couple: Lila/Zal, Lila/Teazle
Being Evil Sucks: Being good gets you locked away to learn a lesson about remembering things other than being good, before you go Knight Templar. Living one's life For the Evulz quickly ends with one dead.
Bling of War: Lila gets some in the third book.
Blue and Orange Morality: We're dealing with The Fair Folk, Elves, Demons and several things which may or may not have what we would traditionally call a consciousness. This happens. The demons, who apparently see self doubt or self-imposed limits as worse than murder, are a relatively normal case.
Bodyguard Crush: Zal/Lila get the Love Match Game, which sort of forces this. Then they marry.
Bread, Eggs, Milk, Squick: More like Squick, Gruesome, Vegetation, Peas, but same idea.
Calvin Ball: Fey sports.
Coming of Age Story: Age aside, the series is still this for Lila. At least Cyborg!Lila.
Conflicting Loyalty: This is going to happen in standard elf culture. An elf will probably be working for multiple factions, and even if one is trying to undermine the other, will not necessarily have one that overrules the other. Yeah.
Curse Cut Short: "What the f..."
Cybernetics Eat Your Soul: Lila frets after this.
Cyborg: Lila
Earn Your Happy Ending
Electronic Eyes: Lila
Elemental Embodiment: Zoomenon is home, but they can travel anywhere.
Elfeminate
Elvish Presley: Zal, despite the preconception that elves can't rock.
Emergency Transformation: Lila
Famed in Story: Zal's a rock star.
Fate Worse Than Death: Tath's description of what the angels did to him.
- Poor son of a bitch, he got it once again, worse, from the three phantoms. That being said, him surviving did scare the crap out of one of them.
The Fettered: Elves.
First-Name Basis: An elf giving you the first half of his/her first name is this.
Fisher Kingdom: Some places can forcibly transform creatures into other shapes.
Foil: The worlds. Interestingly, they manage to all be this for all the others.
Grey and Gray Morality: Characters, individually, are occasionally insane. But given their environments...
Growing Up Sucks: Malachi's opinion. Reality? Not so much.
He Also Did: In-universe version with Zal.
I Know Your True Name: But this only really works on elves, and/or in Alfheim.
Interspecies Romance: As mentioned, elf Zal/human cyborg Lila. As not mentioned, Lila/demon Teazle, Sarasilien the elf/Sorcha, demon.
Kangaroo Court: Zal is put through something akin to a hearing by the elves. He noticed the vacancies in the council where his supporters should have been.
Karma: People who act out of a desire to "do the wrong thing" bring about their own downfall. This is stated in so many words.
Love Is a Weakness: Interestingly enough, Zal.
The Magic Comes Back
Misery Builds Character: Devils will whisper roughly this to their victims.
Name's the Same: Yes, we know which Glinda you thought of.
Ninja Pirate Zombie Robot: Zal is an elvish, demonic rock star. Oh, and he's half and half of both types of elves. Lila is a cyborg secret agent with what just might be latent magic talent and then she gets an Elvish necromancer in her chest. A dead one.
Not So Stoic: Zal manages to get one, despite being...not so stoic.
Offscreen Afterlife: We see the areas leading up to Thanotopia, but...
Only Known by Their Nickname: The default state for elves, see I Know Your True Name.
Our Demons Are Different: Essentially hedonists. No, really. The essential part of being a demon is experiencing as many things as possible, as much as possible. Fighting, cooking, painting, it is an art to them. And color is a huge part of their communication. Their language sounds like song to those who aren't being spoken to.
Our Dragons Are Different: And incredibly mysterious. They can communicate, and are supposed to be marks of good luck...at a distance. They're supposedly attracted by innocence and/or powerful sorcery.
Our Elves Are Better: Tall, ears reaching the top of their heads. Their eyes are usually light-colored, and elves may change color, depending.
Our Fairies Are Different: The most powerful beings, aetherically. And Tricksters, of course. Deal-makers.
Our Wormholes Are Different: Portals between realms function on these rules. Unless you want to get to Faery. Then go find a Kindly One.
Pointy Ears: Elves.
Rage Against the Mentor: Lila to Sarasilien.
The Rock Star: Zal is an elf rock star, though one of the points he likes to make is that he does not limit himself to rock music, because every genre can be good. Incidentally, becoming a rock star is all part of his plan to make "a lot of people free," as Malachi puts it. It's weird, but it works.
Sarcasm Failure: Lila's sister, Max, gets a brief one when she sees Lila in all her Cyborg glory for the first time.
Sophisticated As Hell: Glinda
Swiss Army Appendage: Lila gets these.
That Man Is Dead: Lila says this. Jury's out as to whether this is true, or just her accepting who she was in the first place.
They Do: Lila and Zal, and, to a certain extent, Lila and Teazle.
Time Skip: Normally, where we come back to find that Lila has spent a lot of time in Demonia and married two people, and literally, where Lila skips forward fifty years.
Title Drop: Keeping It Real and Selling Out both get one in Selling Out, and the series gets one in Chasing the Dragon.
Undisclosed Funds: Any time money is mentioned.
The Unfettered: Zal shoots for this. As do many demons.
Voluntary Shapeshifting: Fey, demons, Lila.
We Can Rebuild Her: Lila Black
The Wild Hunt