The Haunted House — Peggy Parish

"Oh, no!" said Liza. "I won't live in a haunted house."

The "haunted house' is the old Blake place, and despite Liza's protests, that's where the Roberts family is going to live. Liza, Bill, and Jed soon realize that something weird is happening in and around their new home. Nearly every morning they find mysterious messages. Strange footprints appear, lights flash, and secret compartments pop open. Is John Blake's ghost responsible? If not, who is?