Class: Book

Attributes:
Title (string)
NumberOfPages (integer)
Author (string)
Color (string)
Genre (string)
NumberOfChapters (integer)
Fiction (boolean)
HardCover (boolean)
ChapterNames (array)
E-book (boolean)
FontSize (integer)

Methods:
Age (current date - publishing date)
AddCoAuthor
AddChapters
Creat E-book
ChangeFontSize
ChangePageCount