Countdown (Standiford novel)

Countdown is the third book in the Unstoppable series of the The 39 Clues franchise. It was written by Natalie Standiford, and published on April 29, 2014. The cover features a broken Mayan artifact, as the book primarily takes place in Tikal, Guatemala. The book cover is also colored orange.

Countdown (Standiford novel)

Countdown is the third book in the Unstoppable series of the The 39 Clues franchise. It was written by Natalie Standiford, and published on April 29, 2014. The cover features a broken Mayan artifact, as the book primarily takes place in Tikal, Guatemala. The book cover is also colored orange.