12 year old Miranda is just learning to navigate the difficult waters of middle school friendships (and boys) when her life is turned upside down by a series of notes left for her by a stranger. The notes are ominous (even creepy in that "To Catch a Predator" way) and hint at a future tragedy. 
 This book grabbed me from the start and was a very enjoyable tale of the struggles of youth with a crazy mystery & time travel woven in. The references to A Wrinkle in Time persuaded me to read that now, though I am listening to the CDs rather than reading.