The first six books are geographical in theme, and describe the history and culture of Egypt (book I), of Mesopotamia, India, Scythia, and Arabia (II), of North Africa (III), and of Greece and Europe (IV–VI).
Enam buku pertama bertemakan geografi, dan menggambarkan sejarah dan kebudayaan Mesir (buku I), Mesopotamia, India, Skythia, dan Arab (II), Afrika Utara (III), dan Yunani serta Eropa (IV - VI).