Significant Language Devices in the novel The Curious Incident of the Dog in the Night-time by Mark Haddon?

What are some language devices in The Curious Incident of the Dog in the Nighttime? Yes, I read the book. But I have trouble finding some. And by language devices I mean metaphors, similes, imagery, irony, and word choice. You can either list it or give me a link to a website. Thanks, gladly appreciated.