Carolyn Keene 
Running into Trouble [EPUB ebook] 

Nancy and George have gone undercover at Brookline High to make sure no more harm comes to track star Samantha Matero. A suspicious accident during a recent practice run resulted in a nasty ankle sprain for Samantha, and now shes receiveing a series of threatening notes and phone calls. And while the constant attention and good looks of fellow student Paul Johnson nearly sidetracks her investigation, Nancys determined to run this race to the endbefore Samanthaa hopes run out.