The Lone Tamer And the Flightless Dragon TLAFD

Eons ago, mankind and the elves engaged in a bloody war which lasted generations. While mankind fought with blood and steel, the elves summoned and tamed monsters and beasts called 'chimeras' to turn the tide of battle onto them.
Grim Fenris is a descendant of a long-lost elven elite bloodline of chimera tamers. His parents left him in the care of his grandfather, who died shortly after he turned thirteen, leaving Grim to fend off for himself in this hostile world.
Two centuries after mankind’s insurmountable victory against the pointy-eared conquerors, the Kingdom of Vanheim had finally known peace. Meanwhile, Grim mysteriously stumbled into a cave where he discovered a flightless baby dragon. Little did he know that this dragon was going to be his partner in crime for the years to come.
The peace did not last long as the humans were once more bombarded with constant attacks from an all too familiar batch of foes – the chimeras.

Disclaimer: I do not own the artworks on the book cover. I simply photoshopped it, all rights go to the creators.