Robin Roberts had some incredible news to celebrate early on Thursday morning before waking up with the nation on Good Morning America.MORE: Robin Roberts shares special present from Gayle KingThe host delivered her usual morning wisdom videos along with her glam fam, and when they finished with the prayer, she shared a big development with her fans.VIDEO: Robin Roberts bids farewell to Good Morning AmericaAfter talking about what they were thankful for, she brought out her newly released book, Brighter By the Day, and said: "You know what I'm most grateful for?"This book, dedicated and inspired by you, [hit the] New York Time bestsellers list. We found out last night."MORE: Exclusive: Robin Roberts opens up about the moment she thought she'd get fired from GMAHer team immediately started cheering and applauding for her.