Also by William Sleator
Novels
Blackbriar
House of Stairs
Into the Dream
The Green Futures of Tycho
Run
Fingers
Interstellar Pig
Singularity
The Boy Who Reversed Himself
The Duplicate
Strange Attractors
The Spirit House
Others See Us
Dangerous Wishes
The Night the Heads Came
The Beasties
The Boxes
Rewind
Boltzmon!
Marco's Millions
Parasite Pig
The Boy Who Couldn't Die
The Last Universe
Hell Phone
Books for Younger Readers
The Angry Moon
Among the Dolls
Once, Said Darlene
That's Silly
Short Story Collection
Oddballs
For Ann Monticone,
who is really the co-author of this book,
a wonderful teacher, and my best friend.
Not everything that can be
counted counts, and not
everything that counts
can be counted.
—Albert Einstein