Secret Worlds
Subtitle: Codebreakers (Secret Worlds)
Edition: 1st edition
Publisher: DK CHILDREN
Published: March 1, 2002
Language: eng
Format: Paperback
Number of pages: 96
ISBN-13: 9780789485304
Subjects: Juvenile Nonfiction; Science & Technology - General; History; Ciphers; Children's Books/Ages 9-12 Science; Science & Nature - General; Children: Grades 4-6; Juvenile literature; History - General; Juvenile Nonfiction / Science & Technology / General; Computers - General; Cryptography; Children's 9-12 - Science