Ayesha Dean: The Seville Secret by Melati Lum - Paperback

Ayesha, Sara, & Jess are back on an exciting adventure, and this time they're off to Spain!
When a friend's beloved grandpa strangely disappears, Ayesha joins in the search to find him. But as she delves further into the mystery, the stakes become more sinister. A link between the missing person and a seventeenth-century diary hints at an ancient, tightly held secret. But each step closer to discovery poses greater chances of peril. Can Ayesha uncover the truth before it claims her life?