Rule reminder
Negative tu imperative: 'Non + infinitive'. Pronoun can be separate (Non me lo dare!) or attached (Non darmelo!). Negative voi: 'Non + conjugated form'. Pronoun goes before (Non ce lo date!) or can attach (Non datecelo!). Both options are correct.
Which is a correct negative imperative for 'Don't give it to me!' (il libro) — tu?