Try Nook Snaps.
Barnes and Nobles created this bimonthly program offering commissioned short-content works. B&N presents a selected group of authors featured in the program.
"The NOOK Snaps program features high-quality short fiction and narrative non-fiction hand-picked by NOOK editors offering fresh perspectives on modern life, all in an easy-to-enjoy length and at an attractive price. The program offers 3 to 5 new NOOK Snaps selections of at least 5,000 words every other month for only $1.99 each."