On a hill on the outskirts of Sweet Valley sits a beautiful old Victorian house. It stood empty until a few weeks ago, when a big family moved in. . .the perfect clients for Elizabeth and Jessica Wakefield's new baby-sitting service. . .

Identical twins Jessica and Elizabeth Wakefield and their friends from Sweet Valley Middle School thought they'd landed their dream job when they started baby-sitting for the Riccoli kids. But little by little their dream job is turning into a mightmare.
Andrew Riccoli dreams someone tried to set fire to his room - and wakes up in a cloud of smoke. Then Gretchen Riccoli dreams she's falling - and wakes up at the bottom of the mansions dark, winding staircase. The baby-sitters are getting scared. . . to scared to close their eyes in the Riccoli mansion.

Don't go to sleep, Sweet Valley . . . You may never wake up!

Something ghastly in the night. . .

Elizabeth followed her sister's gaze. There in the window was the palest, whitest, ghastliest face she had seen in her life. Not quite animal. But certainly not human.
"Oh - " she whispered, backing slowly away. The hideous apparition in the window was more horrible than any nightmare she'd ever had. "Run!" Elizabeth commanded, giving her sister a shove.
Slowly, the face opened what might have been a mouth, revealing cracked and broken teeth. Through the sound of Jessica's scream, Elizabeth could mak eout an evil - sounding laugh.
"I said run!" Elizabeth screamed again.

House of nightmares . . . The Beast Must Die