Yes, he didn't get a skill book but a skill. This was the second one he had gained so far, and his luck was exceptional.
Normally, killed beasts would drop skills in the form of skill books, but that obviously didn't apply to him. Instead of finding books, the skills were directly transmitted to his mind, allowing him to learn them instantly.
His first skill was called Goblin's Intuition. While the name sounded unimpressive and the effects seemed weak at first glance, Leon, being an experienced assassin, recognized its potential. It would prove to be extremely useful in the future.
┏━━━━━━༻❁༺━━━━━━┓
GOBLIN'S INTUITION
A skill imbued with the keen survival instincts of a goblin, allowing you to sense the true power of your adversaries.
•────⋅☾ Effects ☽⋅────•