The co-founder of Twitter has a story to tell, and he’ll need more than 140 characters. Biz Stone has a deal with Grand Central Publishing for Things a Little Bird Told Me, a book about creative thinking that will include personal anecdotes. Grand Central, a division of Hachette Book Group, announced Monday that Stone’s book is scheduled for April 2014. Stone, 38, has written two books about blogging: Blogging: Genius Strategies for Instant Web Content and Who Let The Blogs Out?