BFFs for a while is the eleventh part in the successful girls' series Diary of a Hat, written by Rachel Renée Russell. Starring Nikki Maxwell, blunder queen. Nikki is allowed to participate in a school exchange. Cool, right? Well, not quite. Because who has recently joined the school where Nikki is going for a week? Precisely! Arch-enemy MACKENZIE! Nikki can cry. Will MacKenzie give her the worst week EVER or will she behave herself for once? Reactions to Diary of a Hat: 'Highly recommended for all girls' - CooleSuggesties.nl 'The drawings alone make you very happy.' - Tina 'A bull's-eye for teenagers!' -The Bookseller