The 39 Clues-Rapid Fire

Rapid Fire is a collection of 7 short stories released from December 25, 2011 to December 31, 2011 written by Clifford Riley. Currently they are available in paperback only in the East Asian region and as separate ebooks at 99 cents each in the rest of the world. The short stories serve as either prequels or sequels to the original 39 Clues series. In the case of the latter, they help to bridge the gap to the new Vesper series.