We’ve seen a few artists experiment with selling music directly from tweets through companies like Chirpify and Gumroad. Now the idea is spreading to the book publishing world. Major publisher Hachette announced plans yesterday to sell books on Twitter, starting with a familiar name: musician Amanda Palmer’s book ‘The Art of Asking’. It’ll be followed by astronaut Chris Hadfield’s ‘You Are Here’ and satire compilation ‘The Onion: Magazine: The Iconic Covers that Transformed an Undeserving World’. Hachette is working with Gumroad on the campaign, which will see the books – and these are physical books, not e-books – sold with “bonus” items including original manuscript pages (Palmer), signed photos (Hadfield) and note cards (The Onion). “With so much of our book marketing done socially now, in-stream Twitter purchasing is a natural next step,” said Hachette CEO Michael Pietsch.