Look on the back of the book and change the words.
The author's attitude toward the subject on which he/she is speaking.
attitude is everything like if you were hanging out with your best friend and your feeling down that just makes everyone else in a bad mood.
Vengeful, because it described the injury and vengeful means seeking to harm someone in return for a perceived injury.
The answer is “Topical.” I have to make this 20 characters long, but the answer is topical.