Viridis Books in Order
Part ofCali MacKay Books in OrderThis page lists the Viridis books by Cali MacKay, writing as Calista Taylor, in order, with short summaries, series background, and start here notes.
Last updated: July 5, 2026
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Viridis books in publication order
2 books
Devil on a Sparrow's Wing
by Cali MacKay
2011
London teeters on revolution as Phoebe carries a new elixir north and loses far more than she expected. Grief, politics, and the possibility that Seth may still be alive drive this darker second Viridis novel.
Viridis
by Cali MacKay
2011
In steampunk Victorian London, Lady Phoebe Hughes's pleasure-inducing elixir draws the elite to her club and trouble to her door. Murder, conspiracy, and the return of Seth Elliott turn chemistry into a very dangerous business.
Viridis books in chronological order
Series background & context
Viridis shows another side of Cali MacKay, the one that writes as Calista Taylor and clearly enjoys mixing romance with elaborate genre dressing. These books are set in a steampunk version of Victorian Britain where airships, tinkerers, secret movements, and dangerous inventions sit right beside murder, desire, and political unrest.
The first book, Viridis, centers on Lady Phoebe Hughes, who has created an herbal elixir that heightens the senses and made it part of the allure of her exclusive club. That alone would be enough trouble. Then a murder connects her drink, the city's elite, and a larger struggle involving the Cause, a movement trying to improve life for the poor. Seth Elliott, the tinkerer who once broke Phoebe's heart, reenters the picture just when she least needs emotional complications.
The result is romance wrapped in conspiracy.
Devil on a Sparrow's Wing opens the world up further. London is sliding toward revolution, Phoebe and Seth are pulled into bigger political stakes, and the story expands from personal betrayal to the possibility of mass violence. The series keeps its romantic core, but it also enjoys gadgets, secret organizations, and the messy consequences of trying to change a broken society.
Readers who like their romance with strong speculative flavor will probably get the most out of this page. Viridis is not trying to be a quiet drawing-room love story. It wants mystery, movement, danger, and a heroine whose scientific curiosity is part of the plot. If you enjoy gaslamp romance, steampunk mystery, and relationships tested by revolution-level problems, this is the place to start. Read Viridis first, then move to Devil on a Sparrow's Wing for the wider, darker follow-through.
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