So, have you ever been reading a book and realised that an author really, really likes a certain word? I bet you have! There's nothing wrong with this and, in fact, it can make you feel a little closer to them. It can help you detect their voice and be comforted by the fact it's truly them writing.
Two I have noticed:
Trudi Canavan: 'Shrugged' - they must have large, noticeable shoulders in Kyralia because everybody shrugs before answering a question

Sam Sykes: 'Retorted' - kind of sums Sam Sykes up

Based on the style and tone of his books, retorted is the perfect word to be slotted in there numerous times.