From the back cover:

Pick A Path to Adventure

ONLY YOU CAN SAVE THE WORLD

The evil magic-user Zed has used a powerful, forbidden spell to summon forth the mighty Shen, the dreaded black Dragon of Doom! Unless you can do something to stop him, Zed will turn Shen loose on the world to spread death and destruction wherever he goes.

The perils you face are many, and the choices are yours!

Will you follow Zed to the desolate End of the World and try to prevent his sinister rendevouz with the Dragon of Doom?

Or will you instead proceed to the fabled Dragon Castle in an attempt to foil Zed's evil plan?

In every ENDLESS QUEST book, action and adventure are yours. You will find yourself returning again and again to experience new paths of excitement.

And if your efforts are successful, you will have saved the entire world from the DRAGON OF DOOM

The protagonist is the apprentice magic-user Morgan, who has a pseudo-dragon familiar. Endless Quest #13 is a Dungeons & Dragons Adventure Book.