The service can be accessed from the official GameGadgets website. Order processing and printing is currently handled by Lulu.com, a popular online print-on-demand service.
“We consider this an experiment to see what interest people have in physical products related to our games. If it's successful, we might consider expanding the product line”, says Fredrik Wester, CEO of Paradox Interactive.
The Heir to the Throne strategy guide is a detailed guidebook with 112 pages jam packed with details about the game and how to play it successfully. It also contains historical notes on the Renaissance period, including the Holy Roman Empire and the English Civil War.
The strategy guide available for free for players who have a registered copy of Heir to the Throne on the Paradox forums.
The book is written by Ed Hanks who has written numerous strategy guides for Paradox Interactive, starting with the Europa Universalis III: Collector's Edition guidebook back in 2006.