SQL has concise syntax, flexible usage method and powerful function. It has become the most popular database language (almost any important DBMS supports SQL) and an indispensable, basic skill for any programmers.

First of all, Martin Fowler's Refactoring is a super classic masterpiece in the field of software engineering, known as "Software Engineering Bibles" together with Erich Gamma's Design Patterns. They are must-read books for any programmers.

Performance is the key to success of any websites. And as a matter of fact, the time a web browser loading a web page takes up about 80% of the total time consumed when a visitor is accessing this page. Thus, especially for the current rich media websites or web apps, speed is extremely important. In Even Faster Web Sites, you will learn how to save the valuable website loading time, so as to make your site respond to user's requests more quickly.

Essential C# has always been widely acclaimed as one of the must-read C# related classic books. The content throughout the book is comprehensive and systematic, and the structure is clear and concise. All was so carefully choreographed that the writing and examples are impeccable. In a word, it is seen as one of the preferred works for learning C# language.

Who Moved My Cheese? tells a simple and interesting fable (but full of truth with profound moral about changes in people's lives), conceived by the American writer Spencer Johnson in 1979 and first published in 1998. This book has dominated the top rankings of the best-selling books since publication. Although it's just a booklet with the thickness a little thicker than a DVD.