A new book (The Wind Through the Keyhole) in the series came out this year, and I haven't had a chance to read it. It's shoehorned between Wizard and Glass and Wolves of the Calla. I actually like how the series as a whole ended -- it felt right -- but the way it got there was dubious at best, and eyerollingly bad at worst, with random villains showing up whose only purpose seemed to be to give a meaningful death to an Important Character. Except that I had no attachment to the villain, so that death...not so meaningful.
But Drawing of the Three is one of my favorite books of all time, and Roland and Eddie are two of my favorite literary characters of all time. I listened to the Gunslinger on a drive to and from Chicago/St. Louis. It makes excellent driving material.