About the book: year / “Pine trees have a disease called heart rot,” said Hermione, surprising herself. — This is a fungal infection that causes the destruction of wood, starting from the center of the trunk and branches. The body dies from the inside. - Hermione bit off a piece of skin on her thumb, watching as a drop of blood appeared on the surface. — Funny name, don't you think? Heart rot? - She laughed. - A bit melodramatic.