Measle and the Wrathmonk by Ian Ogilvy

Measle Stubbs lives in a vile house with his hateful guardian, Basil Tramplebone. Basil, who is a "Wrathmonk," a warlock gone mad, has one pleasure, his amazingly elaborate model train set, and one day he reduces Measle to a tiny size and sets him down within it. Before long, Measle discovers six other small humans and a dog, and together they must figure out how to survive in a hostile environment where the only food (donut crumbs left by Basil) will turn them slowly into plastic, avoid the hungry bat that stalks them, and find a way to vanquish Basil.

This book made me think of the Series of Unfortunate Events books. I didn't like it cause I found that things were a little too far fetched for me. The characters had little to no depth. Had just the right amount of scary moments and tension to keep readers interested though.