Ad-Dahna Desert Ad-Dahna Desert The ad-Dahna Desert is the central division of the Arabian Desert. It is a corridor of sandy terrain forming a bow-like shape that connects an-Nafud desert in the north to Rub' al-Khali desert in the south. Its length is more than 1,000 km siding Twaik Mountains from the east and does not exceed 80 km in width. It is also considered the geographical margin separating Al-Ahsa Province from Najd. Al-Dahna Desert is therefore the string that connects the great deserts of Saudi Arabia. The desert is a series of seven successive deserts, separated from one another by plains.
Mystery of the Desert Giant end, the boys discover that Grafton's fellow explorer had a part in the gang of criminal's racket. With this, Grafton is rescued, and the thugs who apparently were smuggling illegal checks across the country are caught. Mystery of the Desert Giant Mystery of the Desert Giant is Volume 40 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by James Buechler in 1961. The Hardy Boys and Chet Morton search on the California desert for missing industrialist, Willard Grafton, and break up a gang of criminals intent on