Astrid Maxxim and her High-Rise Air Purifier – $5.99 in Paperback.

The world’s climate is in crisis and Astrid Maxxim is determined to help by building a device to remove carbon from the atmosphere. A journey to the Beijing Auto Show might provide her with a way to get her invention into production faster, but sinister forces are out to get her. What’s a girl genius to do?

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