Authors: Sara Paretsky
ALSO BY SARA PARETSKY
Windy City Blues
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Copyright © 2013 by Sara Paretsky
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Library of Congress Cataloging-in-Publication Data
Critical mass / Sara Paretsky.
1. Warshawski, V. I. (Fictitious character)—Fiction. 2. Women private investigators—Illinois—Chicago—Fiction. 3. Chicago (Ill.)—Fiction. I. Title.
PS3566.A647C75 2013 2013025097
This is a work of fiction. Names, characters, places, and incidents either are the product of the author’s imagination or are used fictitiously, and any resemblance to actual persons, living or dead, businesses, companies, events, or locales is entirely coincidental.
who taught me to
seek the beauty
of Nature’s secrets
Many people helped me create this novel. My biggest debt goes to my personal physics adviser, S. C. Wright, from the University of Chicago’s Enrico Fermi Institute and Department of Physics. He directed my reading and answered the questions of a physics novice with great kindness and thoroughness.
Dr. Johann Marton, director of the Stefan-Meyer-Institut in Vienna, was generous with both his time and his insights in stepping me through the history of physics in Vienna in the twentieth century.
Thanks to Dr. Marton, I received advice from Dr. Stefan Sienell, MAS, director of the Archives of the Austrian Academy of Sciences, as well as from Dr. Thomas Maisel, director of the Archives for the University of Vienna.
Michael Geoffrey, Chicago patent lawyer, was a most helpful resource for the part of the novel that deals with patent law, with whether patents held by foreign nationals were recognized in U.S. courts, and other critical plot issues.
Leah Richardson, librarian at the University of Chicago Library’s Special Collections, advised me on library policy for digging up names of people consulting library materials.