The Dragon's Dagger — R.A. Salvatore

Gary had longed to return to the realm of Faerie ever since the day he left. In that mystical world hidden behind his house, life was very different. But at least there was beauty, and peace.

But things have changed since Gary's last visit. The sacred armor and magical spear of the land's greatest hero are missing. A wicked king is threatening war on the villages. A banished witch is plotting a scheme. And a dragon who should be banished is burning up the countryside.

Now Gary must traverse the enchanted land to battle the shadows of evil. But this time his journey will take him where no man has gone before--into the lair of the dragon himself!