Stephen King's The Dark Tower: The Complete Concordance

I found this overview of In-World, Mid-World, and End-World both entertaining and invaluable. So, I am convinced, will you.

Furth's concordance anticipates - and answers - virtually every question the Constant Reader might come up with.

An invaluable aid whenever you want to puzzle out all of the referencees . . . or find a refresher course on who's good and who's evil.