Books like The stolen seasons by David Divine

A group of children, entranced with the study of Egypt, play their own Egypt game, are visited by a secret oracle, become involved in a murder, and befriend the Professor before they move on to new interests, such as Gypsies.

The handwritten will of the deceased world-traveler is strange and mysterious. Its cryptic instructions are to deliver "the valuable Aztec warrior to the rightful owner, a descendant of an Aztec warrior." What is the valuable object and where is it? What is the name of the owner and where is he? Frank and Joe Hardy have only one slim clue to work with: the name of a complete stranger who can help find the answers. Despite the harassments, the threats, and the attacks made upon them by an unknown, sinister gang, Frank and Joe unravel clue after clue in their adventure-packed search for the living descendant of the mighty Aztec nation which once ruled Mexico. The hunt leads to a marketplace in Mexico City, to the pyramids at Teotihuacan, to the tombs of Oaxaca -- where Chet Morton, the Hardys' pal, is nearly buried alive by foul play. It takes as much high courage as clever deduction for the young detectives to defeat their ruthless foes and to decipher the fascinating secrets of the strange and mysterious will. - Flyleaf.

When Nic, a slave in the mines outside of Rome, is forced to enter a sealed cavern containing lost treasures of Julius Caesar, he finds himself in possession of an ancient amulet filled with magic once reserved for the Gods, and becomes the center of a conspiracy to overthrow the emperor and destroy Rome. Nic, a slave in the mines of Rome, is forced to enter a sealed cave filled with Julius Caesar's treasures. What he finds will change his destiny and the history of the Empire. Book #1

In this all-new very special mini-series, the Aldens have been recruited by a secret society to return lost artifacts and treasures to their rightful locations—all around the world! After finding a painted turtle figurine, the Aldens are introduced to the Silverton family and Reddimus Society, a secret guild whose mission is to return lost artifacts and treasures to the sites they were taken from. The Aldens board a private train to New Mexico to return the turtle to its original home, and they encounter enemies of Reddimus along the way! The trip is a success… but instead of returning home, there’s a last-minute change in plans. The Boxcar Children must continue the mission for the society and deliver more things, all around the globe!

As the founders of the Chicagoland Detective Agency, a haiku-writing girl and a boy with a talking dog have more than enough cases on their hands (and paws) when a friend vanishes, a mummy's amulet disappears, and an evil scientist stalks human brains and hearts.