A série Jinx , da Sage Blackwood.
Set in a sentient primeval forest called The Urwald, the novel follows the adventures of a boy named Jinx who is abandoned in the forest and rescued by the wizard Simon Magus. Jinx grows up in Simon's house. After the wizard does a spell on Jinx that causes him to lose his ability to see others' emotions, Jinx runs away to seek help from the evil Bonemaster.
Wikipedia, Jinx (Blackwood novel)
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