 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.