Ghosts of the 20th century /
Ghosts of the twentieth century
Cheryl Harness.
- New York : Simon & Schuster Books for Young Readers, c2000.
- [40] p. : col. ill., col. maps ; 26 cm.
Includes bibliographical references (p. 40).
While on a field trip to a museum, a young boy encounters Albert Einstein, who gives him a whirlwind tour of the twentieth century.