Instruct: Classify a review as either positive or negative.
Query: An exciting trip in time

High schooler Katie is going on a summer trip with a likeable group of friends and their history-loving teacher. Katie's epilepsy, now well under control, is only a minor concern for Katie, her Mom and her friends. But when a mixup leaves her without her medication, she is thrown back in time and becomes Kathryn, also dealing with epilepsy, but in the days before the illness was understood and treatable. Kathryn is in great peril, and modern day Katie must act her part and save both of them. This well written and suspenseful tale combines a strong fantasy with a realistic potrait of a young woman handling her medical condition with a level headed maturity. Slightly dated (it was written in 1974; the young women fuss alot about their clothing and "freshen their makeup") it still makes a decent read today. This novel will appeal to preteens who enjoy Nancy Drew and similar mysteries with a strong female protagonist.