Detta är Dragon Champion , av EE Knight, första boken av Age of Fire serie:
Deep in a cave underneath the Red Mountains, a small gray hatchling begins to break free of his egg, and witnesses his two male sibings - a Red hatchling and a Copper hatchling - instinctively fighting for control of the "shelf" their eggs have been laid on. Although the Red initially has the upper hand; crippling the Copper's foreleg and next attacking the gray, the two siblings manage to kill him after the gray guts him with his egg horn and the Copper crushes his throat. The gray then forces his Copper brother off the edge of the egg shelf and devours the corpse of the Red with the two remaining siblings - females - whereupon their mother names him Auron, and lulls him to sleep with a song - briefly waking later when his father arrives.
Jag hittade den med en sökning av bokserier drake "ägg horn" .