"Countdown" is the seventh mission in the "Mars Diaries" book series by Sigmund Brouwer.
This fiction novel was published by Tyndale House Publishers in 2001 and aimed at young adults aged 9-12.
With 144 pages, the book follows an adventure narrative set in the 2000s on Mars.
It features illustrations by Ron Kaufmann and falls under the genres of juvenile fiction, action, and Christian fiction.
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