The Hardy Boys join their father on a trip to Arizona's magnificent Organ Pipe Cactus National Monument-a trip that becomes dangerous as they set out to find the black marketeers who are stealing rare cacti.

 

This is volume 141 in The Hardy Boys .

This book has been graded for interest at 8-12 years.

There are 160 pages in this book. This book was published 2013 by Simon & Schuster .

Franklin W. Dixon is the author of the ever-popular Hardy Boys books.