The Grotto's Secret by Paula Wynne is two stories that intertwine throughout the book. First, we meet TV show host Kelby Wade. She has been introduced to Dr. Roy Robson, and his sister, who believe that Kelby's brother was murdered over his knowledge of a miracle herb, which the pharmaceutical companies want their hands on. Needing this herb to save her niece, she and Dr. Roy Robson set out to find the herb.
Then we meet Ana-Maria de Carbonela. It is the year 1492. She and her mother know how to use the herb, but they are in danger from doing so.
This story was alright, though I didn't care for the going back and forth between the past and the present. I think this story would have been better if we would have learned about the past first, then introduced to the present. I also didn't care for knowing the identity of the bad guy right off the bat. It kind of put a damper on the whole mystery thing the author was going for.