John Cena said his two newly released motivational books exist because 'the BTS Army was brave enough to support my vulnerable moment'. Photo: Filepic Pro wrestler and actor John Cena's latest books may not have been written if not for BTS fans. His two motivational books, Do Your Best Every Day To Do Your Best Every Day and Be A Work In Progress: And Other Things I'd Like To Tell My Younger Self, were released on Tuesday (April 6) and he said the Army - what BTS fans call themselves - supported him during a low point in his life. "I was going through a pretty down period in my life. It was about four years ago and I decided to just have a vulnerable moment and put one of those thought-provoking journal entries out on Twitter," he said in an appearance on