Zelda Pryce Series by Joss Llewelyn, Joseph Robert Lewis

Zelda Pryce is the youngest and most unusual security expert in Washington DC. Using her knowledge of arcane mathematics, she builds beautiful machines that defy explanation and allow her to break into any home, bank, or museum with ease (and in style!). After successfully burgling the Smithsonian, Zelda is hired to test the security at the British Museum in London using her anti-gravity wings and electromagnetic cloak. And that's where everything goes wrong. The museum didn't really hire her... moreZelda Pryce is the youngest and most unusual security expert in Washington DC. Using her knowledge of arcane mathematics, she builds beautiful machines that defy explanation and allow her to break into any home, bank, or museum with ease (and in style!). After successfully burgling the Smithsonian, Zelda is hired to test the security at the British Museum in London using her anti-gravity wings and electromagnetic cloak. And that's where everything goes wrong. The museum didn't really hire her. A thief did. And when Zelda escapes from the London police, the only thing on her mind is tracking down the thief who set her up and nearly destroyed her career. So she teams up with a charming English riskbender and a daring French alchemist to chase the thief from Paris to Rome, from Castle Frankenstein to the Taj Mahal. Together they must escape all manners of strange traps and creatures, and only their arcane skills and tools will keep them alive. But if they can't catch the thief in time, every arcane device in the entire world could be destroyed, and thousands of innocent lives could be lost. This is a world where a Chekhov Gun is a revolver with a mind of its own, a Diogenes Lantern makes people tell the truth, and Occam's Razor is the most dangerous knife in the world. At least it was, until a mad scientist made a sharper one. less

Zelda Pryce's new business of making gorgeous arcane prosthetics is struggling until her hand-crafted arms and legs start transforming her clients into world-class athletes, rock stars, and crime fighters. But just as she starts to taste success, a chain of strange events threatens to destroy her business and her friends... moreZelda Pryce's new business of making gorgeous arcane prosthetics is struggling until her hand-crafted arms and legs start transforming her clients into world-class athletes, rock stars, and crime fighters. But just as she starts to taste success, a chain of strange events threatens to destroy her business and her friends. Her inventions come to life and attack her in the middle of the night, her clients are assaulted in broad daylight, and her best friend is framed for a series of violent crimes. As the foremost expert on arcane devices in Washington DC, Zelda sets out to unravel these mysteries and protect her friends, but her investigation leads not only to a powerful corporation that wants to ruin her business but also to a strange young girl who is keeping a world-shattering secret. In a harrowing race against time, Zelda uses her amazing inventions and a little help from her super-human clients to uncover the truth about the greatest invention in history and to save the life of one innocent person who will change the very definition of what it means to be human. Return to Zelda's world of arcane science where geometers build fantastical devices, alchemists transform the elements on a whim, riskbenders make improbable things happen all the time, and dowsers can find anything that's ever been lost... including a certain runaway girl. less

When Zelda Pryce is asked to assemble an ancient device, the talented young geometrix is drawn into the globe-spanning, centuries-long search for the most dangerous woman in the world. With the help of the ever-charming Clive Caspian, special agent Yasmin Demir, and her friend Jenny Baker, Zelda sets out to learn the secrets of the arcane people known as demons... moreWhen Zelda Pryce is asked to assemble an ancient device, the talented young geometrix is drawn into the globe-spanning, centuries-long search for the most dangerous woman in the world. With the help of the ever-charming Clive Caspian, special agent Yasmin Demir, and her friend Jenny Baker, Zelda sets out to learn the secrets of the arcane people known as demons. From a Siberian prison to a Chinese temple, from a Kenyan wildlife preserve to the very ends of the earth, every answer they find only raises more questions. And the only revelation more terrifying than the demons' plan for the human race is the discovery of the unspeakable act committed by Zelda herself which set all these events in motion in the first place. less

The complete ZELDA PRYCE trilogy of thrilling urban fantasy adventures. Includes The Razor's Edge, The Clockwork Girl, and The Demon Hunt, as well as the series Appendix.