Debut novelist Chelsea Banning’s Dec. 4 Twitter post pulled at our heartstrings. Only two of 37 RSVPs had shown up for the Dec. 3 signing for her first novel, “Of Crowns & Legends.” Within hours, Neil Gaiman, Stephen King, Jodie Picoult, Margaret Atwood, and many other A-list authors had responded with messages of support; and orders for the book had exploded, andd it remains on Arthurian Legend bestseller lists.