Sisters Kimberly Caraballo, 20, and Kira Guadalupe, 19, said they were the first in line, spending the night on an uncomfortable metal bench, and dining on McDonald's.
"We're big fans," Kimberly said.
Kira said their family thought they were "crazy people" and admitted it had been an uncomfortable night.
"Next time, we'll bring a tent!" she said.
The college students said they couldn't wait to read the novel, told this time from the perspective of bondage-king and billionaire Christian Grey, instead of his young, meek lover Anastasia Steele.
The 559-page paperback, Grey: Fifty Shades of Grey as Told by Christian, hit bookstores on her fictional character's birthday, and could be pre-ordered and downloaded on Kindle at midnight.
Such was the frenzy surrounding the announcement of the book's release, it was propelled to an Amazon best-seller.
- AFP