"While you wait" riddle

Steven Porters appeared on IRC channel, and although didnt give any useful information, said that we have a long read ahead of us.

Later, when asked, he posted a combination of letters which lead here.

Riddle solved! We have this.
 * 1) Harry Potter. The word is waited (later told to ignore the "ed")
 * 2) The Long Dark Tea-Time of the Soul. The word is god.
 * 3) The Canterbury Tales: In Modern English (Penguin Classics), The word is blast
 * 4) The Great Dune Trilogy, The word is it

The message was "Wait god Blast It"