This is a bundle product including:

• The Tinker: Master of Modular Mechanical Mayhem
• The Innovator: A Martial Tinker Prestige Class
• The Mechromancer: A Theurge Tinker Prestige Class
• The Rogue Alpha: A Tinker Archetype
• The Steamsinger: A Bard Tinker Prestige Class
• Tinkering 201: 27 Inventions for the Tinker Base Class
• Super Mega Ultra Mecha Fighting for You, Me, and All of Our Friends (A Tinker Prestige Class)
• Under the Knife: The Grafter, a Tinker Prestige Class