Airlords of Han is the 2nd Buck Rogers story, the sequel to Armageddon 2419 A.D.. Anthony Rogers takes the fight to free 25th Century America to the Han overlords. From the March, 1929 issue of Amazing Stories.

Elsewhere I have set down, for whatever interest they have in this, the 25th Century, my personal recollections of the 20th Century. Now it occurs to me that my memoirs of the 25th Century may have an equal interest 500 years from now—particularly in view of that unique perspective from which I have seen the 25th Century, entering it as I did, in one leap across a gap of 492 years. This statement requires elucidation. There are still many in the world who are not familiar with my unique experience...

The novel on which the famous silent movie starring Rudolf Valentino was based. The plot is set in motion as Lady Conway disapproves of Diana's planning a desert trip with just her Arab guides to accompany her. Diana gets kidnapped by the Sheik, Ahmed Ben Hassan. Finally allowed to ride in the desert alone, she plans an escape. However, the Sheik recaptures her. And so the story unfolds.

It was the 34th century and all five of the Federation of Planets around Sol were buzzing with their usual activity when the Raiders appeared. They were indeed Raiders of Universes because they had ravaged many systems before reaching Earth and showed no signs of slowing down in the least. Their weapons were invincible, their greed merciless and their natures completely alien. Indeed 'they' were from another dimension entirely. Eating up entire solar systems and planets, they slowed down just a bit when intelligent life was found on Earth...