One Clear Call
|  First edition | |
| Author | Upton Sinclair | 
|---|---|
| Language | English | 
| Series | Lanny Budd | 
| Genre | Historical novel | 
| Publisher | Viking Press | 
| Publication date | 1948 | 
| Publication place | United States | 
| Media type | Print (Hardcover) | 
| Pages | 629 pp | 
| Preceded by | Presidential Mission | 
| Followed by | O Shepherd, Speak! | 
One Clear Call is the ninth novel in Upton Sinclair's Lanny Budd series. First published in 1948, the story covers the period from 1943 to 1944.
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