Dear Mr. Hadley (the Calling Game)

From the Introduction:

Dear Mr. Hadley,

I believe you have been waiting for this missive for some time. I believe you are ready. Steel yourself for the secrets of the Calling Game. We pieced it together from fragments of the old scrolls and filled it ourselves as need dictated. Complete it with success, and your powers in all aspects of the Art will have multiplied tenfold. Fail and stand to lose much, if not all. I last played the Calling Game two winters ago in the south, during the Shift. The Traveller was a young boy, though one of exceptional skill, and I the Guide.