A class trip to a local natural history museum  takes a  dangerous turn for the characters of this book, the fifth and allegedly final installment of The Secret Series, when a mummy with a missing finger goes missing. Launch date: September 2011.
— As of 10/19/2011 this book had 5 out of 5 stars from 155 reviews on BarnesandNoble.com.
— As of 10/19/2011 this book had 5 out of 5 stars from 7 reviews on Amazon.com.
— As of 10/19/2011 this book had 4.39 out of 5 stars from 106 ratings on GoodReads.com.