Google's Google Play Books market isn't just for Android devices. There's also an iOS app available to read content purchased on that market, and it's just been updated with some new features. Bookmarks let you place a bookmark by touching the top right corner.

Anyone remember HyperCard ? I sure do. I miss HyperCard, an "authoring tool for the rest of us" that allowed mere mortals to make simplistic programs by ordering and linking "cards" and packing them up for users to try out on the Macs -- back in the 1980s, anyway.