FWIW, Manning follows that model: you can buy the physical book from anywhere and it contains a coupon that you can use to get the ebook from their site. That's

FWIW, Manning follows that model: you can buy the physical book from anywhere and it contains a coupon that you can use to get the ebook from their site. That's the only tech editor I know of that does this. No Starch also offers free ebook with any print book bought from their site, but the shipping cost to where I live is too high.