It’s easy! No fancy programming involved. To see the font choices, click here: http://www.google.com/fonts
To get started on a simple, two-step process to add a Google-font to your style-sheet, click here: https://developers.google.com/fonts/docs/getting_started
To add multiple styles of a font family member, use CSS. Include the link for as many weights and styles as you want:
p.normal {
font-weight: normal;
}
p.thick {
font-weight: bold;
}
p.thicker {
font-weight: 900;
}
Also see: Stack Overflow