Harry potter deathly hallows part 1 and book?

my brothers are reading the harry potter series and everytime they finish a book my boyfriend and i watch that movie with them. How far does my brother have to read into the deathly hallows book before we could watch the part 1 movie without spoiling the book at all?Harry potter deathly hallows part 1 and book?
Chapter 24, The Wandmaker. The end of that chapter is where DH1 ends but the middle of that chapter is where DH2 starts
No, it spoils the book.

Alot of info is given away, but the pieces will be put together in part two!Harry potter deathly hallows part 1 and book?
up to where Valdemort finds the Elder wand on Dumbledores corpse
The beach scene after the escape from the Malfoy Manor.Harry potter deathly hallows part 1 and book?
Go up to the part when Dobby dies
I believe that it is chapter 24!

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