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Unknown, 2009
Current format, Unknown, 2009, , No Longer Available.
Unknown, 2009
Current format, Unknown, 2009, , No Longer Available. Offered in 0 more formats
"Merrin and Pearl's little cousin Max is sick, threatening everyone's Mexican holiday. This time the girls find themselves in Max's body, witnessing firsthand the immune system in action. They befriend a white blood cell warrior who leads them into battle against the offending bacteria"--Page 4 of cover.
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