About the Reviewers

Marcus Gabilheri is a computer science student at Oklahoma State University. He was born in Brazil but lived in Spain for 11 years. He moved to the United States to be with his wife, Carissa Gabilheri, and decided to go back to school in the U.S. to follow his passion for programming. As a student at OSU, he has won the University's Mobile App Competition 2 years in a row. Marcus actively participates in the developer community as a Google Developer Group organizer and advocates Android development as well other technologies. He works as a mobile and web developer for Oklahoma State University and enjoys developing Android apps in his spare time. His latest achievement was in the Google Fit developer's challenge, where he was one of the 12 grand-prize winners of the challenge with his fitness app, FitHub.

I would like to thank my wife, Carissa Gabilheri, for understanding and putting up with all the late nights and uncountable hours that I spend in front of my computer. I would also like to say special thanks to my mother, Adriana Andreo, and my grandmother, Maria Antonia Andreo, for raising me by themselves and to my parents-in-law, Randy and Donna Wilson, for accepting me into their family when I moved from Brazil to the U.S.

Andreas G?ransson has been programming mobile phones since before smartphones became popular. He has previously written two books on Android development and has been involved in several open source projects. Beyond his interest in working on the family farm, he is very interested in emerging technologies, specifically, Internet of Things, wearable devices, and cloud-based services.

Dr. Jibo He is currently an assistant professor at Wichita State University. He graduated from Peking University in 2007 and the University of Illinois in 2012 with a research specialty in engineering psychology. He won the Star of Tomorrow Award from Microsoft and was voted the Most Valuable Graduate by the University of Illinois. He directs the Human Automation Interaction Lab at Wichita State University. His lab does research on user experience, mobile devices, driving safety, aviation psychology, and human computer interaction. The goal of his research is to understand the human cognitive processes and develop technologies to improve performance, increase user experience, and mitigate human error. He has experience in developing for Google Glass, Android, iPhone, and smartwatches.

Qian He is an enthusiastic digital gadget lover and experienced software engineer. He got his bachelor's degree in software engineering from Beijing Institute of Technology. After working at IBM and studying at University of Chinese Academy of Sciences, he decided to pursue a doctorate degree in the United States. Currently, he is studying computer science at Worcester Polytechnic Institute. His main research fields are ubiquitous computing and mobile health. Over the last few years, Qian has been interested in wearable devices and has built several famous fitness apps for Android / Android Wear / Pebble.

Jason Salas is a product manager, developer, sportscaster, author, and filmmaker who enjoys a perpetual summer on the island of Guam.

He runs the R&D group for Guam's largest media company, where he also co-anchors the nightly news.

Jason coauthored Designing and Developing for Google Glass (http://www.amazon.com/dp/1491946458/ref=cm_sw_su_dp), by O'Reilly Media, published an e-book about the trials and tribulations of a season in a semipro football league, and previously contributed to a book on Microsoft Hailstorm. He's also a member of the Football Writers Association of America.

You can find Jason at https://plus.google.com/+JasonSalas/posts.