Three original novellas about teleportation, all of which were written for this volume, which is part of Dell's Laurel-Leaf Library that was targeted at high school students and libraries.

Flash Crowd by Larry Niven
You'll Take the High Road by John Brunner
Rumfuddle by Jack Vance

Silverberg writes a 2-page forward.

The series editors were Professor M. Jerry Weiss of Jersey City State College and Professor Charles F. Reasoner of NYU.