Hannes Bok

The Sorcerer's Ship — (1942) From Wikipedia: A man named Gene finds himself cast into a new world by a powerful godlike being. Gene has been changed in such a way that he has every talent needed to survive this new world, including the ability to understand the language of its inhabitants. Gene is rescued from the seemingly endless oceans of this new world by a passing ship that is similar to the looks of a Viking galley. Aboard the ship he makes himself useful as best he can while meeting new friends and enemies. Eventually they come to an island where a mysterious creature who some see as a friend, and some see as an enemy, joins them aboard their ship to help deal with the threat of war from their neighboring kingdom known as Koph. The creature, utilizing his sorcerer-like abilities is employed by the other country known as Nanich to help aid them in the war, but will the sorcerer, and his magic be enough to save the land of Nanich from being overrun by Koph?

Beyond the Golden Stair — (1970) From Wikipedia: Hibbert, an imprisoned innocent, is caught up in the jailbreak of his cellmate Scarlatti, engineered with the assistance of another man, Burks. Forcing Hibbert to accompany them, Scarlatti and Burks make for the Florida Everglades, picking up Scarlatti's girlfriend Carlotta on the way. In the Everglades the four encounter a miraculous golden stairway extending into the sky. Ascending, they find a pool defended by a blue flamingo, which is killed by Burks. Another stairway leads them to the land of Khoire, a strange and mysterious paradise. There a man named Patur exposes the true nature of each by means of a crystal mask. He warns them that they will be transformed in accordance with those natures within a day, and must leave Khoire. Scarlatti and Carlotta's alteration is horrible, and they are consumed by a huge beast; Burks agrees to become a blue flamingo, taking the place of the guardian of the pool, in the hope of some day being readmitted to Khoire. Hibbert is little changed. Returning to the mundane world, he undertakes to find certain persons who can help him gain his own readmittance to Khoire, having fallen in love with one of its denizens, Mareth of the Watchers.