Discover an exhilarating world of learning by solving a series of mathematical problems. Finding the answers will enable readers to advance through an exciting

Who was the model for Vermeer's Girl with a Pearl Earring? How were the Nazca Lines- the giant drawings scrawled across Peru's desert coast- created? Why is Bot

Tragedy has found Cassiopeia Vitt. The woman she admires most, Esmerelda Fontana, has been brutally murdered. Then Cassiopeia’s castle rebuilding project is v

Amal and her friends must solve the mystery of the missing flying machine plans before it costs her father his job at the Air and Space Museum.

The time has come for Cassiopeia Vitt to sell her ancestral home. It sits on a Spanish bluff by the Mediterranean Sea, and bears the name Casa de Hace Mucho Tie