Final answer:
The literary device used in the sentence is a simile.
Step-by-step explanation:
The literary device used in the sentence, 'like the lamb handing a knife to the butcher,' is a simile. A simile is a figurative language that compares two things using the words 'like' or 'as.' In this sentence, Max contemplating giving Liesel Mein Kampf is being compared to a lamb handing a knife to the butcher.