José Manuel Cerrejón González is a full-stack freelance software developer based in Huelva, Spain, and a Raspberry Pi, Odroid, and Banana Pi enthusiast. Nowadays, he blogs regularly on his own website at http://misapuntesde.com/ in both Spanish and English, and he has compiled a great Raspberry Pi resource on Google Docs at http://goo.gl/Iwhbq.
He has also contributed to the community with a project called PiKISS (Pi Keeping It Simple, Stupid!) that you can download from GitHub (https://github.com/jmcerrejon/PiKISS).
Although this is the first book he has reviewed, he has written other articles for the press, such as ODROID Magazine.
You can follow him on Twitter at https://twitter.com/ulysess10.
Kenny Hsu is a Linux system administrator, database administrator, and web developer who has over 7 years of experience. He has executed projects in a broad range of technologies, including Java, Spring Framework, jQuery, MySQL, MariaDB, Ubuntu, Debian, and so on. He is also an open source contributor. This year, he has written some dev board-related tutorials for beginners (who are interested in Banana Pi, Cubieboard, and OpenWRT router), in Chinese. He is also a native Chinese speaker residing in Taiwan.
Some of the tutorials he wrote earlier this year are as follows:
OpenWRT wr841n mod (https://github.com/annbigbig/wr841nd-memo)
Cubian memo (https://github.com/annbigbig/cubian_memo)
If you can speak Chinese, you can interact with him directly in Chinese. He would be very glad to talk to you. You can follow him on Twitter at @annbigbig and you can also e-mail him at <[email protected]>.
Michał Piątkowski is a young freelancer, who always tries to develop his potential. Although he mainly programs in Java, he is also interested in C and C++, especially where microcontrollers are concerned. Moreover, he is fascinated by Banana Pi and Raspberry Pi projects. He devotes his spare time to robotics and electronics. On the Internet, he can be found as Axandar or @Axandar29 on Twitter.