I am runnig a game with all official D&D 3.5 rulebooks available + Dragonlance Campaign books from WoDC, SoveignPress and MW Productions (since it is a Dragonlance campaign). I discard classes/PrCs/items etc that does not fit into the campaign, but rest are all available.
One of my players finds a spell from Kalamar Campaign (Spell Haste), and asks for the spell. But before thinking about if the spell fits into campaign, I wish to be sure about the offical-ness of the book, since I want to be honest to my players about the available books.
It carries D&D logo but belongs to some other publisher (Kenzer & Company). Is it an official book or carries D&D logo according to some license-based issues and counts as a 3rd party source?