- Grades / Interest Level 9 - 12
- Reading Level 9.1 (Flesch-Kincaid)
- Guided Reading Level Z
- Lexile Level 1170
- ATOS Level 9.1
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Product Code R289101 ( MR #053560 )
*** DISCONTINUED (NO LONGER AVAILABLE) ***
They came from a depleted, dying planet. Their target--the riches of a moist, green Earth. With horrifyingly advanced machines of destruction, they began their inexorable conquest.
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