Online Game Pioneers at Work
Foreword by Dr. Richard Bartle, co-creator of the first virtual world
Published by Apress, an imprint of Springer
Year of first publication: 2015
Available at Amazon.com

Gamers at Work: Stories Behind the Games People Play
Foreword by Peter Molyneux OBE, video game pioneer
Published by Apress, an imprint of Springer
Year of first publication: 2012
Available at Amazon.com