The warlord

"Skartaris--a savage world at the center of the Earth, home to monstrous dinosaurs and fantastic creatures, eternal sunlight and warring tribes. The fragile peace is maintained by one man: Travis Morgan, the Warlord, a man from the surface world who built a new life for himself in Skartaris. But Morgan is no longer the only outsider. An expedition of paleontologists and adventurers has discovered Skartaris, allowing a so-called god to use modern technology in a bid for power. Now, Travis Morgan must once again take up his sword and command his army to defend his kingdom and his family from this new evil"--Publisher description.