Nikki Maxwell returns in the 16th installment of the Dork Diaries series, facing her greatest challenge yet: dealing with her bratty little sister Brianna.
 
With only 72 hours before the new school year begins, Nikki’s trying to reinvent herself completely. But when Brianna steals her phone and diary—and chaos ensues—Nikki’s social life, friendships, and crush-life hang in the balance. It’s a roller-coaster of sibling rivalry, school drama, and laugh-out-loud antics starring Nikki and her best friends Chloe and Zoey