Google Books is much improved, but there are still occasional gems:
[via]
From the comments at Crooked Timber, it appears that we may be seeing a new trend in the marketing of philosophy, at least in terms of book cover design — witness this Barnes & Noble digital edition of Kant's Metaphysics of Morals:
Or this iTunes version of the same work:
Unfortunately, multi-modal search technology is not yet good enough to tell us easily whether any classics of linguistics have been marketed with a similar flair. There's this, whose cover picture seems merely random, though perhaps poetically apt for all that:
What else?