Read The Wind Through The Keyhole. It is about Roland's Katet but it was written after the series. I loved it so muchly.Book V is in the can. I am so grateful I won't have to wait years for VI and VII. I was annoyed that it took nearly seven minutes to locate and download them to my kindle.
But seriously, how lucky am I? That tricksie ending in five, and rather than waiting years, I drink a diet soda while I wait for Amazon to give me the other fix, and i'm back in the DT world, reading VI with VII in the wings.