Harriet Tubman, secret agent : how daring slaves and free Blacks spied for the Union during the Civil War /
written by Thomas B. Allen ; with illustrations by Carla Bauer.
- Washington, D.C. : National Geographic Society, 2006.
- 191 p. : ill. ; 18 cm.
Includes bibliographical references and index.
Prologue : Black Moses -- The conductor -- The general -- Harriet's first battle -- Into the secret war -- Black dispatches -- Black spies of river and sea -- Enlisting soldiers and spies -- General Moses leads a raid -- Epilogue : finding the secrets.