In which Harry Potter's book did we learn about Voldemort's childhood?
Voldemort's childhood was depicted in Book 6 of Harry Potter and The Half-Bood's Price. Through the private lessons Harry had with Dumbledore, Harry learned about Voldemort's family and upbringing.
Instruction: In which Harry Potter's book did we learn about Voldemort's childhood?
Context: 
Response: Voldemort's childhood was depicted in Book 6 of Harry Potter and The Half-Bood's Price. Through the private lessons Harry had with Dumbledore, Harry learned about Voldemort's family and upbringing.