"Fifty Shades of Grey" by E.L. James, "The Fault in Our Stars" by John Green, and "Gone Girl" by Gillian Flynn have each occupied a spot on the top 100 list for more than one year, as of 2015. The top sellers list is in constant flux for most titles.
Kindle's past top sellers have included "The Girl on the Train" by Paula Hawkins, "The Crooked House" by Agatha Christie and "The Nightingale" by Kristin Hannah. "Finders Keepers" and "Mr. Mercedes" by Stephen King, "Paper Towns" by John Green, "The Great Santini" by Pat Conroy, "A Song of Ice and Fire" by George R. R. Martin, "Zoo" by James Patterson and "Outlander" by Diana Gabaldon have also all enjoyed some time at the top.
Kindle bestseller lists update every hour, so one is unlikely to see the same books occupying the same rankings for long periods of time. There are other books that have been on the bestseller list for long times, and many more that are bestsellers for a few days or even a few hours before dropping off the top 100 list. The Kindle bestseller chart often diverges from the New York Times Bestseller list, since many self-published books for the Kindle sell as successfully as traditionally published books.