You can never have too many spells. Internet Arcana culled the best of the of OGC spells and put them one easy to use book. The format is for 3.0, but it would not take much at all to convert these to 3.5 or Pathfinder or even "downgrade" them to your favorite retro-clone. Not a "must have" but certainly a worthwhile purchase.
[4 of 5 Stars!]