Talisman

Talisman is a series of four children's books written by Allan Frewin Jones and published in 2005. The main characters are Olivia (Olly) Christie and Josh Welles who live with Olly's father and Josh's brother, who are archæologists, and the plot concerns the hunt for the 'talismans of the moon'. Although there are only four books currently in the series, there are more than four of the 'Talismans of the Moon'. The Tears of Isis Olly and Josh are in Egypt, searching for the 'tears of Isis', the first of the talismans of the moon. The tears of Isis are sapphires, hidden away in an ancient Egyptian pyramid. But is someone else on the tears trail? Who will reach them first?