What is the author's style in The Curious Incident of the Dog in the Night-Time by Mark Haddon?

The language is simple and straightforward, spoken in the tongue of a fifteen-year-old who “sees everything,” cannot tell a lie (although he does occasionally) and believes in nothing that is not real. Occasionally, Christopher’s narration becomes bogged down in discussion of abstractions, math or science. His written voice lacks emotion, and his narration is colored with numbered lists, formulas, diagrams and illustrations. Christopher’s style reflects his mind, where emotions are nearly impossible to deal with but where logic and math is a refuge.