Thongor and the Dragon City (Thongor, #2)

Thongor, swordsman and adventurer, faces his greatest challenge in this thrilling action-packed novel of the rough-hewn civilizations of the Earth's first continent, the Lost Lemuria. Amid untracked jungles, the fearsome heritage of the not-so-long-gone Age of Dinosaurs, Thongor faces fierce beasts and savage beast-men, confronts hidden cities of magic and mystery, and fights to rescue his princess from a network of evil.
It's high adventure in the manner of Edgar Rice Burroughs and Otis Adelbert Kline.