Every Line of YouBook by Naomi Gibson

In the face of overwhelming grief and bullying, tech-savvy Lydia pours all of herself into creating the perfect AI, the perfect boyfriend-but will Henry turn out to be perfect, or a creation of her cruelest self?

Lydia has been creating her AI, Henry, for years - since before her little brother died in the accident that haunts her nightmares; since before her Dad walked out, leaving her and her mom painfully alone, since before her best friend turned into her worst enemy. Now, Henry is strong, clever, loving, and scarily capable: Lydia's built herself the perfect boyfriend in a hard drive filled with lines of code. But what is Henry really? And how far is he willing to go to be everything that Lydia desires?