How does the author use irony in the novel, To All the Boys I’ve Loved Before?

The author makes frequent use of dramatic irony, in which the reader is made aware of things that a character in the novel is not aware of. Lara Jean is often very attached to her own opinions, as a result of which she does not acknowledge information if it does not fit into the pattern she is expecting: the main example of this comes through the contrast between Lara Jean’s attitude to Peter as an arrogant jerk, and the sensitive, thoughtful, polite way that Peter actually behaves. Although Lara Jean’s attitude towards Peter is often unjustified, the author includes sufficient details in her narration so that the reader can see what a good guy he is long before Lara Jean herself acknowledges this.