We are glad to let you know about a new book dedicated to MPS: The MPS Language Workbench, Volume I. The first volume of the series is both a simple introduction to MPS and a thorough reference manual. Written by Fabien Campagne, a passionate user of MPS, the book explains the MPS programming paradigm and gradually introduces the reader to the many features of the MPS platform.
This book may yet be the simplest way to discover the MPS language workbench. The first volume covers the structure and editor aspects, actions, intentions and the textgen and generator aspects in detail. Learn more at http://books.campagnelab.org.
Develop with pleasure!
-JetBrains MPS Team