I admit when it comes to knowledge of Peter Straub's work, I am lacking. I know of him thanks to his collaborations with Stephen King (The Talisman, Black House). When Straub passed away last Sept, I felt I had missed something by not enjoying his writing while he was still on this earth.
Many said at the time that Shadowland is his best work. I'm reading it now. Slow going, but good so far.