The book

Java for Kids is the title of an easy reading book designed to explain how to learn Java programming from Scratch.

The author, Juan Antonio Breña Moral, tries from his dilated educational experience and his experience developing Internet Java projects on multiple markets to teach the language in this useful and short book.

What is Java?

From Wikipedia:

Java is a general-purpose computer programming language that is object-oriented and specifically designed to have as few implementation dependencies as possible. It is intended to let application developers "write once, run anywhere" (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of computer architecture. As of 2016, Java is one of the most popular programming languages with a reported 9 million developers. Java was originally developed by James Gosling at Sun Microsystems (which has since been acquired by Oracle Corporation) and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its syntax from C and C++, but it has fewer low-level facilities than either of them.

Why learn Java?

If you study a bit the market, you will notice that Java is one of the most used programming language using different perspectives like: TIOBE, IEEE Spectrum, Red monk or PYPL.