Harry Potter and the boy who lived
Albus Severus Potter goes back to Hogwarts school of witchcraft and Wizardry for his sixth year. When a curious Albus decides to follow a snake into the Room of Requirement, which everyone thought it had been destroyed during the war, and is unknowingly hit by the Killing Curse.
You know what they say "curiousity killed the cat"
Only that Albus doesn't die. What happens to him? Is the change in him good or bad? What happens when the dark side rises? This can mean only one thing, 'war'.
"The dark lord Shall rise again"
The exact same words of Peter Pettigrew are repeated once again.
(This book is after the cursed child)