There were two coloring books and two coloring/activity books based on Dragon’s Lair, all of them published in 1984 by Marvel Books. The second coloring book is The Magic Sword, and the coloring/activity books are Dirk the Daring Battles the Black Knight and Dirk the Daring Battles the Crypt Creeps.
More on Dragon’s Lair here, and I talk about the Marvel Books imprint here.
(Images via Dragon’s Lair Fans)