Penguin Imprint Picks Up Twilight Fanfic for 'Substantial' Seven Figures, Orders 500K Copies Neetzan Zimmerman · 08/01/12 08:45AM Following in the lucrative footsteps of Fifty Shades of Grey, the author of a pair of popular Twilight fan fiction ebooks has signed a "substantial seven-figure deal" with Penguin's Berkley imprint.