The New York Times bestseller starring Anna Pigeon from the author of Winter Study . “Action-packed…a narrative that plunges readers into mystery [and] mayhem.”— The Denver Post Hoping a raft trip in Big Bend National Park will lift her spirits, Anna Pigeon and her husband Paul go to southwest Texas, where the Rio Grande is running high. The beauty of the Chihuahuan Desert and the power of the river work their magic—until the raft is lost in the rapids and a young college student makes a grisly discovery. Caught in a strainer between two boulders—and more dead than alive—is a pregnant woman. Anna will soon discover that nature isn’t the only one who wants to see the woman and her baby dead… Award-winning Nevada Barr is the author of the New York Times bestselling Anna Pigeon mysteries.  Table of Contents Title Page Copyright Page Dedication   ONE TWO THREE FOUR FIVE SIX SEVEN EIGHT NINE TEN ELEVEN TWELVE THIRTEEN FOURTEEN FIFTEEN SIXTEEN SEVENTEEN EIGHTEEN NINETEEN TWENTY TWENTY-ONE TWENTY-TWO TWENTY-THREE TWENTY-FOUR TWENTY-FIVE TWENTY-SIX TWENTY-SEVEN TWENTY-EIGHT TWENTY-NINE THIRTY THIRTY-ONE THIRTY-TWO THIRTY-THREE THIRTY-FOUR THIRTY-FIVE THIRTY-SIX THIRTY-SEVEN THIRTY-EIGHT THIRTY-NINE FORTY   Acknowledgements ALSO BY NEVADA BARR FICTION Winter Study Hard Truth High Country Flashback Hunting Season Blood Lure Deep South Liberty Falling Blind Descent Endangered Species Firestorm Ill Wind A Superior Death Track of the Cat Bittersweet     NONFICTIONS Seeking Enlightenment . . . Hat by Hat G. P. PUTNAM’S SONS New York G. P. PUTNAM’S SONS PUBLISHERS Since 1838 Published by the Penguin Group Penguin Group (USA) Inc., 375 Hudson Street, New York, New York 10014, USA • Penguin Group (Canada), 90 Eglinton Avenue East, Suite 700, Toronto, Ontario M4P 2Y3, Canada (a division of Pearson Canada Inc.) • Penguin Books Ltd, 80 Strand, London WC2R 0RL, England • Penguin Ireland, 25 St Stephen’s Green, Dublin 2, Ireland (a division of Penguin Books Ltd) • Penguin Group (Australia), 250 Camberwell Road, Camberwell, Victoria 3124, Australia (a division of Pearson Australia Group Pty Ltd) Penguin Books India Pvt Ltd, 11 Community Centre, Panchsheel Park, New Delhi-110 017, India • Penguin Group (NZ), 67 Apollo Drive, Rosedale, North Shore 0632, New Zealand (a division of Pearson New Zealand Ltd) • Penguin Books (South Africa) (Pty) Ltd, 24 Sturdee Avenue, Rosebank, Johannesburg 2196, South Africa Penguin Books Ltd, Registered Offices: 80 Strand, London WC2R 0RL, England   Copyright © 2009 by Nevada Barr All rights reserved. No part of this book may be reproduced, scanned, or distributed in any printed or electronic form without permission. Please do not participate in or encourage piracy of copyrighted materials in violation of the author’s rights. Purchase only authorized editions. Published simultaneously in Canada Library of Congress Cataloging-in-Publication Data Barr, Nevada. Borderline / Nevada Barr. p. cm. eISBN : 978-1-101-02923-7         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. While the author has made every effort to provide accurate telephone numbers and Internet addresses at the time of publication, neither the publisher nor the author assumes any responsibility for errors, or for changes that occur after publication. Further, the publisher does not have any control over and does not assume any responsibility for author or third-party websites or their content. For Kendall, who gave us a magical dog CONFESSION For purposes of mine own I have done many terrible things. I have moved thousands of tons of rocks from Mexico to America at the rock slide in Santa Elena Canyon. I have rerouted roads and allowed horses to be ridden where they are banned by park regulation. I have changed park protocols and, in some dire cases, rewritten a rule or two. In my defense, I have given the park a shiny new helicopter and updated a few other sundry pieces of machinery. Now that the book is finished, I promise to return Big Bend to the pristine and well-run park that I found it. PROLOGUE W ailing cut through the perfect darkness. Like a machete, it slashed away the tangle of sleeping dreams holding Gabriela hostage, neither unconscious nor conscious. The baby did that to her. Before the baby she’d slept deep and warm and silent, curled next to Marcos. But now there was the baby and Marcos had become a Diablo, a devil, a man who didn’t burn up in the fires of hell. Thin shrieking cut through the walls of her belly and the baby woke kicking, its little heels thumping into the soft flesh beneath her rib cage. “You are a devil like your papa,” she murmured, and reached out and turned on the bedside lamp. “Marcos.” Gabri