Hermione's Plan to Check if Sirius is at Grimmauld Place

PAGES: 735-737

Hermione devises a plan to check if Sirius is still at Grimmauld Place by using Umbridge's fireplace and the Floo Network. She enlists Ginny Weasley and Luna Lovegood to act as lookouts while she and Harry sneak into Umbridge's office under the Invisibility Cloak. Ron volunteers to distract Umbridge, creating a diversion involving Peeves.