Something wicked this way comes, Mr. Dark's Pandemonium Carnival.

More about Something wicked this way comes, Mr. Dark's Pandemonium Carnival.

I read this when I was thirteen and have never forgotten it. Disney made a film of it in 1983.
Here are some excerpts from the book:
Beware the autumn people...

"There was only one thing sure. Two lines of Shakespeare said it. He should write them in the middle of the clock of books, to fix the heart of his apprehension:
By the pricking of my thumbs,
Something wicked this way comes.
So vague yet so immense. He did not want to live with it. Yet he knew that, during this night, unless he lived with it very well, he might have to live with it for all the rest of his life."
― Ray Bradbury, Something Wicked This Way Comes, 1962

(The Pandemonium Carnival is not like any other)

“The stuff of nightmare is their plain bread. They butter it with pain. They set their clocks by deathwatch beetles, and thrive the centuries. They were the men with the leather-ribbon whips who sweated up the Pyramids seasoning it with other people's salt and other people's cracked hearts. They coursed Europe on the White Horses of the Plague. They whispered to Caesar that he was mortal, then sold daggers at half-price in the grand March sale. Some must have been lazing clowns, foot props for emperors, princes, and epileptic popes. Then out on the road, Gypsies in time, their populations grew as the world grew, spread, and there was more delicious variety of pain to thrive on. The train put wheels under them and here they run down the log road out of the Gothic and baroque; look at their wagons and coaches, the carving like medieval shrines, all of it stuff once drawn by horses, mules, or, maybe, men.”
― Ray Bradbury, Something Wicked This Way Comes, 1962