As Harry Turtledove writes multi-volume works, spoilers are unavoidable, and so will almost never be labelled. Those wishing to avoid spoilers should be very careful about which articles they read.
When a new novel has been recently released spoilers may be marked for a short time, allowing those who began reading the book as soon as it became available a reasonable amount of time in which to finish reading. Turtle Fan 11:06, June 10, 2011 (UTC)