I loaned my copy of The Hunger Games
For me, the answer usually seems to be some sort of supernatural or fantastical element. With the exception of the Millennium Trilogy
Once, in college, I started reading The Sparrow around 12, meaning to read for half an hour and then go to sleep. I finished it at 7 am, just in time to get dressed for work. I worked in a daze, partly from the lack of sleep, partly because my brain was still on Rakhat.
And it holds true for most fantasy series-- Harry Potter
I don't know if it's the magic of surreal settings, supernatural elements, or just engrossing plots and quests, but I find many fantasy novels are addicting. (And with respect to the Millennium trilogy-- although they are mysteries, Lisbeth Salander is a pretty fantastical character!)
What books do you find addicting? Do you agree that science fiction and fantasy novels are harder to put down?
This post contains Amazon affiliate links.