"Helmond and van der Vlist are gifted teachers who help students and faculty find their way in the burgeoning field of platform studies. Platforms is a timely and much-needed book to help us understand the rapidly changing online environment."José van Dijck, Utrecht University"This should be the first book you read on platforms. Helmond and van der Vlist provide a masterful introduction and critical guide to understanding plaforms. A must-read for students and scholars alike."Marc Steinberg, Concordia University