Christina and Mimi are uber-excited to visit a famous castle in Germany. They call it the Crystal Castle. I think it looks like a fairytale castle, says Christina. Little does she know dark mystery's afoot! See if you can translate the German clues and figure out what's going on and why Grant is SNEEZING so much! And who is Jason Hewitt, anyway? An uber-adventure, for sure! Nothing is quite what it seems, it seems! Spooky!This mystery incorporates history, geography, culture and cliffhanger chapters that keep kids begging for more! This mystery includes SAT words, educational facts, fun and humor. This Carole Marsh Mystery also has an Accelerated Reader quiz, a Lexile Level, a Fountas & Pinnell guided reading level and Developmental Reading Assessment.