The Alchemy of Murder — Carol McCleary

The world's most famous reporter, the intrepid Nellie Bly, teams up with science fiction genius Jules Verne, the notorious wit and outrageous rogue Oscar Wilde, and the greatest microbe-hunter in history, Louis Pasteur. Together, they must solve the crime of the century.

They are all in Paris--the capital of Europe and center of world culture--for the 1889 World's Fair. A spectacular extravaganza dedicated to new industries, scientific discoveries, and global exploration, its gateway is the soaring Eiffel Tower. But an enigmatic killer stalks the streets and a virulent plague is striking down Parisians by the thousands. Convinced that the killings are connected to the pandemic, Nellie is determined to stop them both... no matter what the risks.