TheBestseller
Observatory
1975
THE ULTRA SECRET
F.W. Winterbotham
Cover of THE ULTRA SECRET

THE ULTRA SECRET

by F.W. Winterbotham

Harper & Row · 1999

Peak rank

#5

Weeks on list

11

Chart History

#1510151975

11 weeks on the Hardcover Nonfiction list, peaking at #5

"Operation Ultra was designed to intercept and decode German signals sent using Enigma, the top-secret German cypher machine. F.W. Winterbotham, was the man responsible for the organization, distribution and security of Ultra. This is his personal account of the operation."

All Appearances

10NEWJanuary 26, 1975wk 1
8↑2February 2, 1975wk 2
6↑2February 9, 1975wk 3
7↓1February 16, 1975wk 4
6↑1February 23, 1975wk 5
5↑1March 2, 1975wk 6
6↓1March 9, 1975wk 7
7↓1March 16, 1975wk 8
8↓1March 23, 1975wk 9
8—March 30, 1975wk 10
10↓2April 6, 1975wk 11

Details

Published
1999
Pages
199
Publisher
Harper & Row
Categories
World War, 1939-1945

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