The RSpec Book: Behaviour-Driven Development with RSpec, Cucumber, and Friends
by David Chelimsky, Dave Astels, Zach Dennis, Aslak Hellesoy, Bryan Helmkamp, and Dan North
Behaviour-Driven Development (BDD) gives you the best of Test Driven Development, Domain Driven Design, and Acceptance Test Driven Planning techniques, so you can create better software with self-documenting, executable tests that bring users and developers together with a common language. Whether you’re developing applications, frameworks, or the libraries that power them, this book promises to help you write better code, better tests, and deliver better software.
http://www.pragprog.com/titles/achbd/the-rspec-book
Embedded Linux Primer: A Practical Real-World Approach, Second Edition
by Chris Hallinan
This book is a definitive guide to building efficient, high-value, embedded systems with Linux. It has now been thoroughly updated for the newest Linux kernels, capabilities, tools, and hardware support. This edition also adds entirely new chapters on UDEV, USB, and open source build systems.
http://www.informit.com/title/0137017839
Murach's PHP and MySQL
by Joel Murach and Ray Harris
Anytime you're on the web, you're going to be landing on PHP pages. By most counts, over a million web sites have been written in PHP, including some of today's largest, most recognizable sites. And those sites often use MySQL as the database. This book covers the skills you need to develop almost any type of database-driven web site with PHP and MySQL.
http://www.murach.com/books/phps/index.htm
