SQL Pocket Guide is a valuable reference book for developers, administrators, and analysts who work with databases in their daily tasks. This compact and convenient guide provides a quick reference to the most commonly used SQL syntax and techniques, allowing users to quickly find the information they need to perform a variety of database tasks.

Among all the books on algorithms, some are very rigorous, but not comprehensive; others cover a lot of materials, but lack preciseness. Introduction to Algorithms combines rigor and comprehensiveness together, discusses all kinds of algorithms in depth, and focuses on making the design and analysis of these algorithms more acceptable to readers at all levels.

As a rising star, PHP has taken the advantages of the formerly popular languages like Java, C and Perl, and focuses on the Internet. So in the field of Web development (especially web services), PHP owns unique advantages. In other words, until now, the ability and position of any other language cannot be comparable to it in the web field. There is no doubt that it will still be the world of the Internet for a long time to come. And, the Internet cannot go without Web, and the Web cannot do without PHP (mainly all kinds of web services based on PHP).

For developing web-based and database driven high-performance, dynamic Web applications at express speed, PHP (powerful scripting language) and MySQL (quick and reliable database) are absolutely the only pair of best partners. Tutorials about them, I came close to forget this classic bible-level PHP and MySQL Web Development, Fourth Edition (although a bit old without involving the newest features).

If Blender is the best free alternative of Autodesk 3ds Max or Maya, then GIMP is the best free alternative to Adobe Photoshop. Similarly, its powerful and numerous functions, complex features require special books to explain in depth, otherwise, it's extremely difficult to master GIMP. The Book of GIMP is one of the best few complete guide books about GIMP that cover almost any GIMP knowledge.