Glenlock

Seeking solace in a remote mountain cabin in northern Maine, haunted by the death of a comrade during his last tour in Afghanistan, Special Forces Operative Hal Bennet never expected to come face-to-face with a medieval knight when he opened his door during a powerful storm. A man accompanied by his pet saber-tooth tiger.
No sooner has Crown Prince Henry Lackland from the land of Glenlock introduced himself to a confused Hal Bennet than the knight and his cat are whisked away by the strange, unnatural storm. The sudden and unearthly disappearance leaves the Special Forces Operative questioning his own sanity; but Henry left proof of their encounter -- his chainmail, and his sword.
Haunted for a year by this chance meeting, Hal is determined to find answers to his haunting questions. Where did Henry come from? Why did he show up at the cabin? And where did he go?
Uncertain of what lies ahead, Hal travels back to the mountain, to the same storm that has never abated, and vanishes.
Waking in the lands of Glenlock, Hal is thrust into a world of kingdoms populated by civilizations from Earth's early history.
He soon finds himself drawn into a plot to overthrow Henry's father, the king of Cent. But malevolent forces are lurking as bands of strange-looking men, deformed daemons bent on destruction and the abduction of the innocent. Can Hal overcome his past demons to rise to the fight ahead, or is Glenlock destined to fall into darkness?