Signed ebooks, numbered and verifiable.
Authors upload an EPUB, sign it with a stylus on an iPad, Android tablet or a Wacom pad, and sell a limited run of numbered signed copies. Every copy carries a signature page, and anyone can check it is genuine.
For authors
Upload your DRM-free EPUB, set a price and a signed-edition premium, choose how many copies, and invite a co-signer such as the subject of a biography.
For readers
Buy the standard edition, or an exclusive signed one: copy 37 of 1000, with the author's real handwriting and a ledger entry that proves it.