This lack of platforminess is what makes many iPad magazine apps impotent. They end up in no better a position than a printed magazine. There are no routes by which you can directly get to their content. You can’t point in. You’re forced to go through the “front door” to get anywhere. And it’s a door usually weighing several hundred megabytes and infuriatingly difficult to unlock.
Craig Mod’s work has only recently come to my attention. I plan now to go back and read more of what he has written in the past.