The legs have it!
Apparently this is the meme that keeps on giving. Not long after writing about how the author of Opal Mehta copied passages from the work of Megan McCafferty, I noticed a curiously familiar image in a book catalog:
Wait . . . wasn't this the same photo, more or less, as the one used for McCafferty's Charmed Thirds?
The covers are identical, except that the latter has a blue-shifted pillowcase, some blueish detritus . . . and no mirror.