Ernest Cline was planning to drive his tricked-out DeLorean to Austin for a talk about his upcoming novel Armada, but Game of Thrones author George R.R. Martin called him up and asked for it. Cline said he could borrow the car for as long as he wanted to, but asked for a dragon egg in return. Martin obliged. When I meet Cline, a DeLorean Motor Company T-shirt peeks out from behind his black blazer.