Keeping Secrets — P.J. Denton

Jo's just won the school Spelling Bee and her parents are letting her host the Pyjama Gang's next sleepover to celebrate! But her friends are acting suspiciously and keeping secrets, and Jo's worried they don't want to come to her sleepover - or worse, that they don't want to be friends with her at all! Things aren't always what they seem, though, and sometimes you just have to trust your best friends...