The Deathly Hallows (Mark Spoilers!)

[Renmiri]

@Firo

Dumbledore gave Hermoine the fairy tale book, because it was clearly the fact that he was aware that Hermione is alert, bright and can decipher things more easily than other wizards/witches. The book led to the discovery of the Deathly Hallows in a roundabout way because of the emblem on the first page, and the tale of the three brothers and Death.

I think it was to slow down Harry and friends from chasing the Deathly Hallows. By making sure Hermione knew it was a children's book Dumbledore made her be the opposing force whenever Harry tried to chase it. And it worked too, right ? Hermione was the biggest opposition to chase the Hallows.