Cambridge Discovery Education Interactive Readers are the next
generation of graded readers - captivating topics, high-impact video,
and interactive exercises designed to motivate and engage. How do we
decide where a country ends and begins? Come examine the ideas of
borders and territory, on Earth and beyond. Use the unique code inside
the book to access the online reader, complete with videos and
interactive exercises. Word count: 2736. Lexile Reading Level: 780L