From the back of the book:
"Somewhere in the realm of Avalon is an open gateway into the ghastly Kingdom of the Dead. Through it comes hideous monsters and foul plagues. It must be closed or Avalon will be destroyed. King Arthur needs a special hero for this awesome Quest, for a grisly death seems certain. No-one has ever returned alive from the horrors on the Other Side. That Hero is YOU."
This is an adventure gamebook. You will need two dice, a pencil, skill and luck to play and fight your way through it. Take the magic sword Excalibur, your wits and courage, and start your journey to the Gateway of Doom!
Book #3 in the series