The Adventures of Thane Johnson and the Sword of Alexander the Great by Thomas John Papadimos

This book begins with the theft of the sword of Alexander the Great from the National Archaeological Museum in Athens, Greece. The person accused of the theft is the museum's senior curator, Angus Johnson, father of Thane Johnson who is innocent. Proof of his innocence and recovery of the sword is undertaken by five clever and insightful teens: his son Thane, his daughter Alaina, his nephew Leo, and two friends of Thane, Achilles, and Thomas. Join the adventure as they solve the heist.