Barber, Nicola, <br/><br/>
Who broke the wartime codes? / 
Nicola Barber. 
 - 64 pages :  illustrations (some color) ;  25 cm 
 - Primary source detectives .
<br/><br/>Includes bibliographical references (pages 62-63) and index. 
<br/><br/>A daring raid -- What were wartime codes? -- Who wanted to break them? -- What sort of people were they? -- What did they do to break the codes? -- Who used the information they found? -- What happened to the code-breakers after the war? -- Why was their work significant? 
<br/><br/> Junior Library Guild 
<br/><br/> This account of the Allied efforts to decode Axis messages--and keep the success of their efforts secret--describes the men and women behind the scenes, as well as the institutions they served, and the early computers devised for the purpose. 
<br/><br/> 11-13.  6-8.  1130L  Lexile. 
<br/><br/>
<br/><br/> A Junior Library Guild selection (JLG) 
<br/><br/><label>ISBN: </label>9781432996062 (hb) :  $18.75 1432996061 (hb) 9781432996130 (pb) 1432996134 (pb) 
<br/><br/><label>LCCN: </label>2013015848 
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War, 1939-1945--Cryptography--Juvenile literature.<br/>World War, 1939-1945--Electronic intelligence--United States--Juvenile literature.<br/>World War, 1939-1945--Electronic intelligence--Great Britain--Juvenile literature.<br/>Cryptographers--History--United States--20th century--Juvenile literature.<br/>Cryptographers--History--Great Britain--20th century--Juvenile literature.<br/>Cryptography--History--United States--20th century--Juvenile literature.<br/>Cryptography--History--Great Britain--20th century--Juvenile literature.
<br/><br/><label>LC Class. No.: </label>D810.C88  / B36 2014 
<br/><br/><label>Dewey Class. No.: </label>940.54/8641