Ok, as promised below, here is a bit of Dragonlance arcana. The original cover for The Thieves' Guild included the Tower of High Sorcery. Compare this to the cover in the right-hand column under My Novels. As Thieves' Guild takes place just before Dragons of a Fallen Sun, the Tower can't be there.
The first I saw of the cover was when it appeared on Amazon.com a few months before publication. I sent an urgent email to WotC alerting them of this error, thankfully not too late for the cover to be changed before publication.
Also, I had not yet turned in the final draft of Thieves' Guild when the cover appeared. Cael's cane wasn't a cane in the novel at this point, it was a staff. I had to go back and write the cane-form into the story to explain its appearance on the cover.