Margaret Fraser, who has written a series of Edgar nominated medieval mysteries, will be bringing her vast knowledge of the middle ages to Troll Lord Games' The Art Of War by Justin Bacon.  Ms. Fraser will act as a historical consultant and also provide authentic heraldic designs for the project.  The Art Of War is a 192-page hardcover d20 sourcebook that will allow players to add all sorts of combat to their d20 games -- everything from minor skirmishes to epic scale combats and sieges.  Troll Lords plans to issue The Art of War (srp $29.95) this summer in time for GenCon.