Strange Sounds. Missing Mics. Backward Announcements. Talking Walls?! At United Middle School, ordinary days don't stay ordinary for long—not when Jake, Emily, Max, and Amy are around. In The Mystery of the Missing Microphone , the school's only working mic vanishes just before the big talent show. Can the young investigators crack the case before the curtain rises? Static and Scrambled Eggs delivers a breakfast-time mystery when the morning announcements start playing backwards. Is it a prank? A glitch? Or something… coded? ⏰ Then in The Case of the Vanishing Signal , clocks spin, bells chime at the wrong time, and the entire school schedule descends into chaos. What—or who —is behind the disappearing network? Finally, in The Case of the Talking Walls , the shelves whisper, the walls moo, and Jake might be losing it... unless Chip and Mia are up to something again. But when hidden devices turn up, the team realizes this mystery may go deeper than they thought. Packed with humor, teamwork, and wild twists, this collection will keep readers guessing—and giggling—until the very last page!