I don't know if I can remember the books that I have read in one sit, but I will try while I make this list, if I can't remember I will put books that it took me a short time to read them.
Actually last week I was surprise that I finish a book in one sit!
This one was the book I finished in a few hours last week, I was so proud, it was short anyway but even the short books take me like a week to finish them.
The Silver Kiss is a short book and I loved it so much that I am sure I finished it in one sit, and if I did not it probably did not take me days to finish it.
PS: Everyone should read this book!
The Cirque Du Freak Series: these books, I know they took me a day or two to finish them.
Look for Me By Moonlight: This one I am sure it took me short time to read it, can't remember well but since I loved it that means it did not take me too long.
I loved the Heavenly series! I was so sad it ended, this was one of the first books I have read, I started late in my adulthood to read. I just wish I see more people in blogs and my book club reading these books. They are great.
Then we have the Twilight series but I read them in Spanish. These were actually my very first books to read, when I finished the first book I was obsessed with it and I wanted more so I read them really fast.