From the introduction:
This is a netbook for the World of Tékumel.
These maps of the Five Empires originally appeared as part of Empire of the Petal Throne.
This PDF includes three informational pages (US Letter) and two pages of high-resolution maps (11" x 17").
The maps were originally published in 1975 as components in the boxed set Empire of the Petal Throne.
This item has, essentially, the same contents as Maps for Empire of the Petal Throne.