License

• The contents of this book can be used for free and without charge for individual and non-commercial purposes.
• It is allowed to create pdf and epub formats for non-commercial and personal use purposes and copy them to personal devices such as PCs, tablets, and e-book readers. If the reader cannot create the format *self, it is also allowed to ask a friend to create a file.
• Referencing or linking some parts(within 30 lines) of this book through academic purposes or technical blogs is permitted without the author's permission.
• Hosting the contents of this book on web pages without the author's permission is not allowed.
• Derived work including translation without the author's permission is not allowed.
• A list of individuals/companies allowed to host this book or use it for commercial purposes will be introduced later on this page.