Invasion of the Body Squeezers: Part 1 (Goosebumps 2000 #4) by R.L. Stine - Vintage Paperback

"I am ready," I repeated, speaking from my robotlike trance. "They are coming!"

"Stop that, Jack," Mrs. Hansen scolded. "You're scaring everyone."

"Huh?" Voices buzzed in my ear. I could barely hear my own voice.

"The others are coming. From their planet," I announced. "They are coming very soon."