The book starts with the basics of parallelization, covers the main concepts, grammar, and setting up a development environment for OpenCL, concluding with source-code walkthroughs of the FFT and Mersenne Twister algorithms written in OpenCL. The revised edition includes a summary of changes made in OpenCL Specification 1.2, reference functions corresponding to 1.2, and updated excursion environments. It is highly recommended for those wishing to get started on programming in OpenCL.