I’ve released the updated Go Books app for iPad and iPhone. Thus Mac and iOS versions of Go Books now access a common database, making your book purchases portable: use your Mac to enjoy books you’ve bought on your mobile device, and buy books directly at gobooks.com to read on your Mac, iPad, and iPhone, as well as Android devices in the future.
To register the books you’ve bought, choose Register Your Purchases in GoBooks on your iPad or iPhone, confirm your email, and your books should appear in the Mac version of Go Books. Note that your book purchases are linked to your email; there is no need for a password. Check here for more details.
As this drastically changes how Go Books works, there’s a lot of potential for things to go wrong. So please let me know if you run into any issues. If your books don’t show up, try Restore Previous Purchases. And bear with me as everybody hits the server at the same time.
Invincible is a treat on the iPad, but full-screen on your Mac takes it to a new level. Enjoy!
Update (2015-01-05): While it worked fine for most, a number of users have run into a crash on Register Your Purchases. I’ve figured out what’s going wrong; sorry about that. I’ve submitted an updated version to Apple and requested an expedited review.
Update (2015-01-06): That crash has been fixed in version 4.0.1.