The Book of Three
| First edition dustjacket with Ness artwork | |
| Author | Lloyd Alexander | 
|---|---|
| Cover artist | Evaline Ness | 
| Series | The Chronicles of Prydain | 
| Genre | Children's literature, fantasy | 
| Publisher | Holt, Rinehart and Winston | 
| Publication date | March 12, 1964 | 
| Publication place | United States | 
| Media type | Print (hardcover) | 
| Pages | 217 (first edition) | 
| ISBN | 0-8050-0874-8 | 
| OCLC | 17720934 | 
| LC Class | PZ8.A37 Bo | 
| Followed by | The Black Cauldron | 
The Book of Three (1964) is a high fantasy novel by American writer Lloyd Alexander, the first of five volumes in The Chronicles of Prydain. The series follows the adventures of Taran the Assistant Pig-Keeper, a youth raised by Dallben the enchanter, as he nears manhood while helping to resist the forces of Arawn Death-Lord.
The book provided many elements of plot for the 1985 Disney animated feature The Black Cauldron.