Nicholas Sparks – 11 Adaptations
Message in a Bottle (1999), A Walk to Remember (2002), The Notebook (2004), Nights in Rodanthe (2008), Dear John (2010), The Last Song (2010), The Lucky One (2012), Safe Haven (2013), The Best of Me (2014), The Longest Ride (2015), The Choice (2016).
Tom Clancy? (6)
Charles Dickens (40, including several remakes)
Louis L'Amour (16)
Elmore Leonard (29)
What a cr*ptastic list