If you mean the book of the same name by Patrick Horne, it is about a neo-chivalric group that wants to 'correct' world society for the benefit of mankind, using a technology developed during WWII that utilises the power of 'Vril'
If you mean the poem by Byron, it is ambiguous and could refer to Venus or the Moon. Venus seems more likely (known as the Morning/Evening Star whereas the Moon has never been known as a 'star') and the descriptions and allusions probably fit better, but the answer is debatable.
The Sun of the Sleepless was created in 1992.
The duration of The Sun of the Sleepless is 2.05 hours.
The ISBN of Doktor Sleepless is 1592910556.
Sleepless - song - was created in 1984.
When one is unable to sleep, he/she is said to be in a sleepless state.
The duration of Sleepless in Seattle is 1.77 hours.
The suffix of "sleepless" is "-less", which means without.
Sleepless in Seattle
Another Sleepless Night was created in 2001.
Sleepless in Peckham was created on 2003-12-25.
Sleepless Night - song - was created in 1984.
Sleepless in Seattle was created on 1993-06-15.